our correspondent brian ross was able to speak to one of them. here it is. >> turn on the television to see what is going on. i saw there was a shooting over at cambridge, m.i.t. police officer. and at that point i heard an unbelievable amount of police presence coming down our street. i counted about 40, 45 police officers coming down in their cars. i got out on the balcony to see what i could see and at which point i heard a very large explosion, a boom. i didn't see it. but as i looked up in the sky, i could see it lit up the entire sky around watertown. which led meme down an see what could. i started walking this direction and i could smell a distinct smell of gun powder in the air a. . >> once again, one suspect in the boston marathon bombings dead and a gunfight with police. the second suspect on the loose. a manhunt going on at this hour for the suspect and any potential explosives that he may or may not have scattered in the area. >> look at this picture one last time. the man in black the is the suspect that is dead and the man in the w

we are several blocks from where brian ross' position is. we're not sure how close to any potential danger that we are. >> this was a special report i'm diana perez. >> for the folks on the west coast you may be going back to "nightline." for everyone else, we're be right back. switch ycar insurance to this has been a special report from abc news. oh, no, no, no...i'm sorry, but this is all wrong? i would never say that. writer: well what would you say? gecko: well i'd probably emphasize the savings. ya know...lose that green with envy bit. rubbish. it's just a reference about my complexion. writer: but the focus groups thought that the... gecko: focus groups. geico doesn't use focus groups. uhh...excuse me. no one told me we were using focus groups. vo: geico. fifteen minutes could save you fifteen percent or more on car insurance. cheryl burke is cha-cha-ing in depend silhouette briefs for charity, to prove that with soft fabric and waistband, the best protection looks, fits, and feels just like underwear. get a free sample and try for you

brian ross, if you can hear me now, do you know anything about that? is there any chance that the older brother's wife is in custody now, do we know anything? sounds as if brian is debriefing somebody on scene there, i'll go to pierre thomas with the same question? he is doing the same thing. you are getting an eyewitness on reporting at work, the abc news force. this is what we do, seeking out every single piece of information. so, we're doing it with you, you are part of our news room, in a sense here online. and we have someone else on the telephone? irene santoro. irene, hello, it's diane. tell me what you saw. >> hello, diane. yes, well, we've been here on franklin street, well, all day, and we've been hearing everything all night, as well. with hall continuers and lights, et set that here. but presently, we have about, oh, maybe about 70 police vehicles lining of washburn street. that's perpendicular to franklin street, which is right in front of our house. and it's something that, it's a little ironic, because as soon as the governor lifted the

we begin with chief investigative brian ross, on the ground, all through the night in watertown, brian, a night of gunfire, bombs, police hunting down the terrorists right now. >> reporter: indeed, george. he was last seen 12 hours ago here in watertown, since then, no sightings of him. so the search is almost urgent. authorities are saying that suspect number two dzhokhar tsarnaev is armed and extremely dangerous, may be wearing a suicide vest. >> indications are strong that the current outstanding party may be wearing a suicide vest. again, all units use extreme caution approaching any party that matches the description of the outstanding party. >> reporter: it began last night. with the robbery of a convenience store in cambridge at approximately 7:30. a surveillance camera inside the store, caught the image of the man eye dented mied five hours earlier of suspect number two in the marathon bombings. on the campus of m.i.t. a shoot-out that left an police officer dead. next, the two men carjacked a rcedes and then led the police on a wild, violent chase >> wha reports that have expl

abc's chief investigative correspondent, brian ross, back with us here tonight. this was chilling today. >> indeed, based on what the mayor and the police commissioner said, new york just missed being attacked by the accused boston bombers who late last week decided they wanted to maim and kill even more. the decision to target times square was spur of the moment, that's what the new york mayor says the surviving brother revealed to the fbi. >> he told the fbi apparently that he and his brother had intended to drive to new york and designate additional explosives in times square. >> reporter: but new york was spared, officials say, at the moment the two accused bombers had to stop for gas in the car they had hijacked in cambridge, and the younger brother, 19-year-old dzhokhar tsarnaev, went inside for snacks. >> the driver used the opportunity to escape and call the police. that led to the shootout in watertown. >> reporter: that shootout, captured in these still photos involved a violent gunfight, and -- >> there's definitely hand grenades and automatic gunfire.

brian ross, anything else that stood out to you? >> reporter: they talked about an exchange of gun fire, diane. they did shoot back at some point. and may have hit him when they did, i was told. so, that wasn't quite that they held off entirely. but it was exactly as martha and pierre described to us as we came forward with a special looking radar that sees thermal images and certainly the u.s. attorney said that they have made a public security exception and not give him his miranda warning. they will question him about what larger terror cell he might or might not be part of. >> again, it was dave hennebury who went back to look at his beloved boat and saw, instead, the man suspected of being a terrorist, a bomber. and we're told he's in his 60s, he's a retired telecommunications worker. and it was his phone call that really directed the police. we are getting so many reports out of boston on facebook from people saying, that's why they call them boston's bravest, boston proud, boston grateful and also thanking everyone for their

but want to go to brian ross in watertown and clearly, brian, this situation is intensified over the last half hour or so after we saw governor deval patrick and the chief, the police commissioner come out and warn everyone to stay inside. a lot more information coming in, brian ross. >> reporter: certainly is and very grim-faced governor and police officials not sharing all they know, but deeply concerned enough to lock down the entire city of boston. tell everybody to stay inside and lock their doors in watertown where they've been searching for suspect number two since about 10:30, 11:00 last night. there's a no-fly zone and a police helicopter circling about a half mile away.at is the primw where they're looking for suspect number two. he is the 19-year-old brother. the other one, the dead suspect, 26 apparently moved here just five years ago and we can see and he was trying to become a boxer on the u.s. olympic boxing team and he wrote on a page posted there, "i have no american friends. i don't understand em?." >> okay, brian. we got from a police scanner chilling information.

brian ross joins me now. based on what they're hearing from this young man, safe to say there is no foreign plot here? >> best they can tell in the initial assessment. it is the twisted thinking of a self radicalized young man. the only real help is the younger brother, as far as they can tell. >> speaking of the younger brother who is talking inside the walls of the hospital behind us, can they take what he says at face value? >> not at all. it's in his interest to minimize his own role. they continue to look for any possible overseas connections or a wider cell but so far, no indication of that. >> are they finding any hints of imminent threats out there? >> no current threats at the moment. >> thanks for your work. >>> coming up here from stun grenades to robots. inside the search for a 19-year-old who was briefly the most wanted man in manager. girl vo: i'm pretty conservative. very logical thinker. (laughs) i'm telling you right now, the girl back at home would absolutely not have taken a zip line in the

as i said, we want to start off right now with brian ross. brian, what is the latest? >> good morning, george. been identified as suspect number one at yesterday's fbi news conference is dead, according to the head of the massachusetts state police. the man identified as suspect number two, the man in the white cap is at large. the evening began, apparently, with an attempted hold up at a 7-eleven store. video from inside the store matched the suspect number two from the marathon bombings. at that point they went and tried to steal a car, a mercedes suv. in the interim they shot and killed, according to state police, a police officer at m.i.t., another transit police officer was wounded. the chase continued here to watertown with explosives, according to authorities. the people in the car were shooting and throwing hand grenades. there was a shootout and at that point suspect number one, whose name we do not know, was shot. suspect number two escaped and now a huge manhunt o this area for suspect number two. residents have been told to stay inside. do not open the door

i'm here with brian ross and martha raddatz and, brian, we now know that the fbi is in charge of this investigation. >> they have taken the lead in the investigation. they called it potential terrorism. they have yet not enough evidence to tell whether it's domestic terrorism, international terrorism but looking for all kinds of clues in the videos that were taken by witnesses and also the clues of what the explosive was made out of which can be helpful in determining the signature of the bombmaker. >> their first press conference yesterday they were asking residents of boston to send in any video they had and would comb through it. martha raddatz, one of the interesting factors there was no specific threat coming in before the marathon. >> there were no specific threats whatsoever. it was just a beautiful day in boston. the boston marathon, of course, we had national guard there and a lot of police presence, but nothing indicating any sort of terrorist attack or any kind of attack. >> okay, we see the officials walking in right now. we know that governor deval patrick and mayor tom m

our brian ross on the scene. >>> and the suspects' roots. we go to the other side of the planet, to their homeland in russia for clues about their past. >> illuminating information from the other side of the world this morning. >>> and the extraordinary role of social media in the crisis. from helping track down the suspect to helping keep bostonians indoors as the manhunt was under way in their city. much more on this special edition of "gma" coming up after a very quick break. keep it here. can't believe i bought a 6-inch subway breakfast sub and got this one free. wow! [ tires screech ] buy one 6-inch sub? [ tires screech ] ...and get another one free? before 9am. all april long. [ male announcer ] subway, eat fresh. when your allergies start, doctors recommend taking one non-drowsy claritin every day during your allergy season for continuous relief. 18 days! 12 days! 24 days of continuous relief. live claritin clear. every day. imagine hstyle,fashion, quality and comfort, all come together in your home. imagine no more. there's a sale go

abc's brian ross with that. >> reporter: federal authorities today were searching behind a cambridge drug store in an area where the brother's father used to repair cars, looking for more possible explosives or where the bombs are made. so far, there's no evidence of a continuing threat. the fbi also wants to question tamerlan's wife, seen over the weekend, leaving the family apartment. a rhode island native, she converted to islam and changed her name from katherine to karima. because she lived in the same cambridge apartment where authorities believed the two brothers hatched their plot, she could provide clues about whether others were involved. her family issued a statement today saying, "we know now that we never really knew tamerlan tsarnaev." now a possible link to a murder, two years ago. local prosecutors said today they are investigatoring whether tamerlan was involved in the brutal murder of three young men, one of whom was his roommate. the three were found with their throats slashed, covered in marijuana and cash. also under investigation, the six-month trip he took to r

that's where abc's brian ross continues our coverage. >> reporter: this is what remains of the pressure cooker turned into a homemade bomb seen in this fbi crime lab photo obtained by abc news. it was hidden in a black backpack. the simple bombs were responsible for 12 seconds of horror. cell phone footage shot by a spectator between the two explosions. authorities are going through race day videos frame by frame. here the white smoke seen after the detonation indicates a bomb built with low velocity explosive mixtures, not the more powerful military grade. >> they may not have had the resources as we've seen in other bomb attacks, but they knew how to make the bomb go boom. >> reporter: but tuesday there was a new plea for help in identifying the bomber. >> any individual who expressed a desire to target the marathon, suspicious interest in researching how to create explosive devices, the noise of explosions in remote areas prior to yesterday, which may have been used as tests by those responsible for these acts. >> reporter: the efforts to learn who is behind the bombing often require

abc's chief investigative correspondent, brian ross, with the latest. >> reporter: it was only a few months ago that dzhokhar tsarnaev posted this video of himself online playfully teasing his brother's daughter. today the 19-year-old is at the devens federal medical center outside boston. confined by himself to a tiny cell, a taste of what awaits him if convicted of the marathon bombing. >> he doesn't have a life, period. his total existence will be lockdown. >> reporter: meantime, fbi agents are widening their net in looking for possible accomplices of the two brothers in the bombing. >> some may have been involved helping build the bombs, others may have helped radicalize the brothers. >> reporter: fbi agents today also continued to press the katherine russell, the widow of the elder brother tamerlan, about her knowledge of her husband's activities. agents left her house carrying evidence bags, and she was seen leaving with her attorneys, who have said she did not know about the bomb plot. and the investigative threads continue to stretch into russia. at the same time tamerlan tra

i'm here are josh elliott, brian ross, martha raddatz. everyone reported this story all night long after those 12 seconds of terror in boston. >> about three blocks from here, george, just to our left on boylston street and what we can tell you about this mile 26, it's not a finish line now, it looks far more like a war zone. three are dead. 145 injured at least. 15 of them critically as we saw national guardsmen actually deploying into the subway stop right here, as they are moving stop to top through the city this morning. >> boston is shut down and cities across the country are on high alert. we'll talk to also a number of eyewitnesses including the college student who crossed the finish line at the moment of the bomb's impact. >> a new factor now for the entire country. how will our fashion change? and for so many parents waking up with children this morning, what do you say to your kids this morning about the terror here in boston? amy robach, sam champ quion in times square this morning. where there's also a very big police presence

i'm here in boston along with josh elliott, martha raddatz and brian ross working the story all night long joining us this morning and, josh, this image from "the boston globe" really captures it all, "marathon terror." >> all the more staggering considering the day, patriots' day, a day important to the whole of new england. day read in one story where this city becomes a village and think what happens in the village center, that town center torn apart. >> patriots' day, 117th running of the boston marathon. all of boston coming out to celebrate even a game at fenway yesterday afternoon but look at the terror and chaos after those bombs hit. we have brand-new video coming in right now. people trapped between the two he can explosions exactly 12 seconds apart. watch and listen. this is what it felt like if you were caught between the two bombs. >> holy [ muted ]. >> oh, my god. [ explosion ] >> and, josh, 12 seconds of terror and captured so clearly right there. came right before 3:00 p.m., about 2:50. that hour when the bulk of runners would cross the finish line. >> the average fini

brian ross is in boston this morning. outside the hospital where the suspect is right now. brian, good morning. >> reporter: good morning, dan. he's reported to be in serious but stable condition. he was brought here last night. capping a remarkable 24-hour period that began when the fbi first released surveillance footage of two unidentified men. within the course of two hours, they had been identified by police after being spotted at a convenience store where there was a robbery. they went on to abush a police officer on the m.i.t. campus. it resulted in a wild car case through the streets cambridge and water totown. with the two brothers inside returning fire and throwing out gren fades and homemade explosives. a further gun fight in watertown where the older brother was mortally wounded. a police officer was wounded. the 19-year-old college student tuk off on foot. the authorities launched a mass i have manhunt. had the whole city of watertown and much of boston on lockdown. as they look for him. the area he was ultimately found the be hiding was one block away from the

and i want to go to brian ross. brian? >> choppers moved in. it's back to the same, serious and overwhelming presence of law enforcement. and they're back now to the point where they think they have a sense of where he is. as they're are bringing in resources you can imagine u-turns and law enforcement front teams with word that. they have special s.w.a.t. teams responding they know how to deal with something like that. they know this is a cop killer, they don't want to be one of the cops kill sod they're going to go in with caution, heavy body armor and weapons. >> i want to go to peer thomas. you said there was a fear the suspect could be watching the media and fact they sent everybody into the street again makes you wonder the timing. was that a diversion? they didn't want him to know perhaps they spotted him? they were on him? >> that wouldo be that this was gainsmanship by law enforcement officials. they were so concerned he was monitoring them, they didn't want to give hints ofr operations so we have calls out in washington making -- may

and for that, abc's brian ross joins us. brian, what do they know? >> good evening, terry. right now, this is an investigation with great urgency because whoever did it is still at large and it's not known whether more attacks are planned. today there was a great breakthrough. according to the fbi, they have recovered the partial mangled remains of one of the bombs that did not fully explode. it turns out it's made out of common kitchen items, a pressure cooker. this exact model that we bought for $140 tonight about a half mile from here. but at a bomb it was palled with wires, electronic circuit board, tiny ball bearings and nails. all designed to maim and kill and get maximum damage to its victims. this is what remains of the pressure cooker turned into a moment made bomb. seen in this fbi crime lab photo obtained by abc news. it was hidden in a black backpack. what's left of it seen in this photo. the simple bombs were responsible for 12 seconds of horror. cell phone footage shot by a spectator between the two explosions. >> i have have victim here with shrapnel in the l

speaking of influences, as brian ross said in that at-bats story apparently tamerlan had a couple of influences. one was a convert to islam named misha. he used to go to info wars, alex jones is going bliss system on that now a false flag on top of a false flag. is it relatives who influenced him? what's your take on it? >> they should be looking into lieu influenced tamerlan. more than likely we'll find that he may have had overseas influences. he spent six months in 2012 in russia and came back and created at least three functioning explosive devices. from what we understand, he learned from an on line magazine an al-qaeda linked publication, but how many people know how to put together an eye kia piece of furniture from the directions, let alone make a functioning explosive device. i wouldn't be surprised to find he had some training with the handling of explosives overseas. cenk: we don't know yet. it's speculation. i'm against all the warrantless wiretapping, et cetera, but there is one candidate for tracking it's people who read "inspire" magazine, radical muslims to attack, i'

and our team is standing by to bring you the latest reporting, and we'll start with abc's brian ross who is in boston tonight. brian? >> reporter: no one is in custody, but there are new fast-moving developments and valuable new clues about the bomb and the bomber. investigators at the crime scene have already recovered the mangled remains of one pressure cooker bomb which apparently failed to fully explode, according to counterterrorism officials briefed on the case. late today the fbi said it's looking for a man carrying an unusually heavy black bag. >> the bag would have been heavy because of the components believed to be in it. >> reporter: the fbi has lots of

ross. brian? >> reporter: diane, authorities put out the word today, just 48 hours after the bombs went off, that they might have found the bomber. the developments came on a day of unfulfilled expectations and a serious case of security jitters. >> this is not a drill. this is not a drill. >> reporter: the federal courthouse, where any suspect would stand trial, was evacuated late this afternoon because of a bomb threat that, understandably, was taken very seriously. >> what are they telling you? >> code red evacuation. >> code red, evacuate the building. >> reporter: no bomb was found. but the law enforcement response forced a postponement of a news conference where officials had planned to talk about a possible suspect. authorities say the fbi is focused on photographs, including some taken by a surveillance camera at the lord & taylor store, that show a man in the race-day crowd, using a cellphone, with a black bag strapped across his chest that authorities say may contain the bomb. the

brian ross takes you inside the interrogation that revealed this new information. >> the decision to target the new york and times square was spur of the moment. that's what the new york mayor says surviving brother revealed to the fbi. >> he told the fbi apparently that he and his brother had intended to drive to new york and designate additional explosives in times square. >>reporter: but new york was spared officials say at the moment the 2 accused bomb hers to stop for gas in the car they had hijacked in cambridge. the younger brother, 19-year-old dzhokhar tsarnaev went inside for snack. >> driver used the opportunity to escape and call the police. that eventually led to the shoot out in water town. >>reporter: that shoot out captured the still photo involved violent gunfight and authorities said the 2 brother his at least 6 bombs including another pressure cooker device seen here just some of what might have been used in times square. >> we don't know if we would have been able to stop the terrorists had they arrived here from boston. we just thankful that we didn't have to find

brian ross, abc news, new york. >>> one of the most inspiring survivor stories from the boston marathon bombings is that of heather abbott, the rhode island native is all smiles explaining that she chose to have part of her left leg and her foot amputated. her foot was shattered by one of the bombs as she waited with friends to go into a bar. she says her spirit is intact, adding she is grateful to the stranger who rescued her. >> holding a woman whose, nearly lost her leg and is losing an incredible amount of blood. >> although it is something that i certainly wouldn't wish upon myself or anyone else. it is really not as bad as i c. >> doctors told abbott her foot would never have healed properly. she says she is looking forward to wearing heels again some time soon. >>> investigators have yet to poinpoint what caused last week's deadly explosion at the fertilizer plant in the town of west, texas. sources tell abc news it was ammonia nitrate stored at the plant that produced such a powerful explosion. some congressional democrats want to know if the plant was exempt from certain federa

brian ross, abc news, boston. >>> a bit more now about the infrared images frida night's dramtu. otal of three stunun grenade tenade as they're called. go off there at the boat where dzhokhar tsarnaev was hiding as we know, tsarnaev was wounded. the chief of police in watertown, massachusetts tells martha raddatz, at that point authorities weren't taking any chances. >> he was very slow and lethargic, every move he made. and they could see there was no device on his chest. concern was what is in the boat? was it more explosive devices? >> he also said police were still very concerned that tsarnaev wanted to go out and kill more people. he described it as an incredible feeling when they knewy the finally had him in custody. >>> it could be days before the neighborhood where last week's shootout with police took place gets back to normal. >> abc's brandi hitt joining us from boston with that part of the story. brandi? >> reporter: good morning, john, diana. this is still an active crime scene and will likely remain that way for a couple more days. the fbi is still on scene. over my

brian ross is right here tonight. >>> chemical weapons. this evening has syria crossed that line? the stunning new intelligence. what now from the white house? martha raddatz reports. >>> hail to the chief. five american presidents, five first ladies. an emotional george w. bush at his new library. and bill clinton on mr. bush's paintings. >> those bathroom sketches were wonderful -- [ laughter ] >> and tonight diane sawyer and laura bush behind the scenes. the moment that changed it all. >>> and subway surprise. the famous singer about to stun those passengers walking through that door with a performance. you're about to see it too. ♪

here is our chief investigative correspondent brian ross. >> reporter: at one school in massachusetts, students get what is called skin shock therapy. in kentucky, a mother found her autistic 8-year-old son had been stuffed in a therapeutic duffel bag like this one. and across the country, abc news found school children as young as 7 put in padded rooms or cells, specially made for children said to be out of control in class. regarded as barbaric by some educators, but legal in most states. >> it's scary. really scary. even for the bravest person in the world, it's still really scary. >> reporter: when leslie nowes of arizona discovered her second grade son in this padded cell without her consent, she made a secret cell phone video and launched a public campaign to stop their use. >> it breaks my heart. it really does. that's what caused me to want to fight this fight. >> reporter: last week success as the arizona legislature passed a law restricting the use of the padded cells without parental consent. the governor of arizona signed the law saying, there must be a better way. despite

abc's brian ross has the latest. >> reporter: federal authorities were searching behind a cambridge drugstore in an area where the brothers' father used to repair cars, looking for possible explosives or where the bombs were made. there is no evidence of a continuing threat. the fbi wants to question tamerlan's wife, seen over the weekend leaving the family apartment. a rhode island native, she converted to islam and changed her name from catherine to karina. because she lived in the same cambridge apartment where authorities believe the two brothers hatched their plot, she could provide clues about whether others were involved. her family issued a statement saying, we know that we never really knew tamerlan tsarnaev. and now there is a possible link to a murder two years ago. local prosecutors said they're investigating whether tamerlan was involved in the brutal murder of three young men, one of whom was his roommate. the three were found with their throats slashed, covered in marijuana and cash. also under investigation, the six-month trip that tamerlan took last year to russia at a time t

with more here is our chief investigative correspondent brian ross. >> reporter: with injuries to his head, neck, legs and hands healing, the hospital upgraded the condition of dzhokhar tsarnaev from serious to fair. so far, the only word he has spoken its a grunted no. at the same time, friends sought to upgrade his image. one posted this unidated video on youtube showing dzhokhar doing the robot dance with buddies on the wrestling team. hardly the anti-american islamic radical accused of following his brother and bombing the marathon. >> it does appear the elder brother was the driving force that he was very angry at u.s. foreign policy. >> reporter: the younger brother told the fbi that he and his brother were inspired by the anti-u.s. internet preaching, of the radical cleric anwar al-awlaki. though the american born al qaeda figure was killed a year and a half ago. his words still have power. here, condemning actions in iraq and afghanistan, which the younger brother said became their motivation to attack. >> we have chosen the path of war in order to defend ourselves from your o

as new yorkers shutter at the thought at what could have been, brian ross uncovers the alleged deadly plan gone awry mere hours before detonation. >> juju, what the new york mayor and police commissioner said thursday, dmork just missed being attacked by the accused boston bombers they arnt payly sought to maim and kill again. >> the fact is is new york city remains a prime target for those who hate america and want to kill americans. >> and no target seems more attractive than times square. the surviving brother told the fbi he and his holder brother made the decision to head here one week ago tonight. to carry off a second attack at this crowded cross roads. >> the boston marathon bombers planned to travel to manhattan to detonate their remaining bombs in sometimes square. >> investigators say it was a spur of the moment decision by the brother ps. >> they discussed this while driving around in the suv that they hijacked after they shot and killed an mit police officer in cambridge. >> but new york was spared, officials say, when the two bombers had to stop for gas in the hijacked c

here's abc's chief investigative correspondent brian ross. >> reporter: the federal courthouse in boston where any suspect would likely stand trial was evacuated late in the day because of a bomb threat that understandably was taken very seriously. >> what are they telling you? >> code red, evacuate the building. >> code red, evacuate the building. >> reporter: no bomb was found, it was only two days ago that terror and strategy struck boston at the finish line of its storied patriots day marathon. it set off a frantic search to find the killer or killers with an entirely new set of methods at the disposal of investigators who are now looking for the person or persons responsible. >> everyone does have a digital profile that offers you a couple of opportunities. the first opportunity it offers you is to try to find the right people to look at. if someone's talking about an act of violence, that somebody obviously should come into the investigative lens. >> reporter: authorities say the fbi is focused on photographs, including some taken by a surveillance camera at the lord and taylor sto

ross for more on that. brian. >> reporter: well, george, they've imposed a no-fly zone over watertown, several thousand police, i would say, have been here going door to door trying to find this suspect. so far without success. we expect the governor, he's just pulled up over here with heavily armed police surrounding him, as well and, in fact, before they set this up, they had dogs come through they said for our safety to make sure that we'd be safe. they continue to feel that this suspect, number two, may not be the only one they're looking for, so they're very concerned there could be other devices and other associates that are attached to this group that hit the boston marathon on monday and then, of course, the wild and violent overnight >> let's get more on this from pierre thomas in washington. pierre, as you've been reporting, brothers from chechnya, at least the two suspects we know of. >> reporter: that's the operating assumption right now, george, and just to piggyback on what briasan w saying, t

we begin with chief investigative correspondent brian ross on the ground all through the night in watertown, brian, a night of gunfire, a night of bombs and now door-to-door search for that dangerous terrorist. >> reporter: that's right, george and dangerous is the word. the fbi described him yesterday as armed and extremely dangerous, those words are certainly true. residents of this town have been told they may not leave their homes. they cannot go in cars, all stores have been shut. this town is shut down as a terrorist is somewhere in the vicinity. it began with the robbery of a convenience store in cambridge, around 10:30 thursday night. a surveillance camera inside the store captured the image that masked the man identified only five hours earlier as suspect number two in the maratho bombin a short while later on the campus of m.i.t. in cambrie, shoot-ou left an m.i.t. police officer dead. next the two men caredck a merced su and led police on a wild, violent chase through the streets of cambridge into neighboring watertown. >> we have reports that they have explosives here at the sce

brian ross is there for us now. brian, all that video coming in may be bearing fruit. >> reporter: george. they've been going through tons of videos with special facial recognition software. they have identified at least one of the bombers, potential suspect in the crowd. we're told that they identified one person who appears to place a bag that they believe contained one of the bombs on the street going through videos taken by a boston police department surveillance camera a long the race route. >> brian, they will be releasing, we think, some images later today? >> reporter: they are discussing whether they're going to put that out there, some images have been showing up on the internet that not the suspects. the police and fbi released a freeze frame of one image they think could be a potential suspect. >> linsey davis outside the cathedral of the holy cross where the prayer service is going on. i know you've been meeting with the families of the victims all week long. we've been hearing that they have stories of

we start with our chief investigative correspondent, brian ross. he's outside the hospital. brian? >> reporter: good evening. the headlines say the nightmare in boston is over. that's hardly the case for the investigation as the fbi now seeks the motive of the accused suspect and his dead brother. whether they were in league with others here or overseas. as police and federal agents closed in on the accused bomber last night, with a helicopter beaming back these remarkable thermal images of him hiding in a boat. >> we have movement in the boat. he just sat up. he is moving, and flailing about, quite a bit of movement. >> reporter: the orders went out to do everything to capture 19-year-old dzhokhar tsarnaev alive. even after exchange of gunfire. >> all units, do not return fire. >> reporter: from the white house down, the priority now is to learn the motives of the two brothers who authorities say are responsible for the successful terror attack on the boston marathon. >> we will determine what happened. we will investigate any associations that these terrorists may have had. >> re

the latest reporting and we'll start with abc's brian ross who is no boston tonight. brian? >> reporter: no one is in custody, but there are new developments about the bomb and the bomber. vffingsors at the crime scene have already recovered the remains of one pressure cooker bomb which failed to fully explode. according to officials briefed on the case. late today the fbi said it's looking for a man carrying an unusually heavy black bag. >> the bag would have been heavy because of the components believed to be in it. >> reporter: the fbi has losts of clues already. the white smoke indicates a bomb built with low velocity mixture turs, not military grade. >> they may not have had the resources as we've seen in other bomb attacks, but they knew how to make the bomb go boom. >> reporter: experts say the large pieces of metal, as seen here in the air suggest the bombs might have been concealed in or under a mailbox or trash barrel, as one witness described. >> i literally saw the garbage barrel explode. i saw at the flash, the fire, the smoke and i ran as fast as i could. >> al

let's begin with abc's brian ross, with the latest right now. brian? >> good evening. there are important new clues into the bomb and the bomber. but the road begins with an examination of that bomb. important new details have emerged from fbi agents who say they have recovered a significant part, a mangled piece of one of the bombs, recovered on the scene. it turns out to be a common kitchen item. they say it is a medium-sized pressure cooker that was packed with explosives, wires, and an electronic circuit board, as well as tiny nails and ball bearings, in order to maximize the damage to anyone in the blast zone. authorities believe they can examine that particular half bomb now. they've got it at the base in virginia, where it's being examined by fbi technicians. they believe they can find signatures and footprints that would be unique to that bomb and perhaps match it up to other bombs somewhere else in the world, somewhere else in this country. that will be the road to finding the bomber. the fbi put out a plea to anyone who saw a person carrying an unusually heav

abc's chief investigative correspondent, brian ross, will take us frame by frame through the clues. brian? >> reporter: good evening. federal authorities now believe that a team of at least two men was responsible for the bombings here. as you say, described as armed and extremely dangerous. the fbi is basing its two-bomber theory on these surveillance camera videos and still pictures made public late today. two white men in their 20s, according to the fbi. one with a black cap, the second with a white cap worn backwards. both wearing backpacks that the fbi believe held the bombs. off to the side of this video, runners can be seen heading to the finish line and time code markers indicate the footage was made about 13 minutes before the first bomb went off. the fbi says only one of the two potential suspects, the one with the white cap, was actually seen placing his backpack at the scene of an explosion. >> we are releasing photos of these two suspects. re identift o. they appear to be associated. >> reporter: officials say they made the images public now becae they nd the faces to n

abc's chief investigative correspondent, brian ross, has the latest details and the new clues. >> reporter: u.s. authorities now believe a turning point for tamerlan tsarnaev came last year in the russian republic of dagestan, at this mosque known to be a gathering spot for extremists. russian security services have told their american counterparts the boston resident was seen meeting and leaving from the mosque with a known chechen terror recruiter, mansur nidal, who was killed in a stand-off with authorities while tsarnaev was in dagestan. the chechen insurgency is part of a larger violent group that has used a reign of terror in its efforts to impose islamic law and values across portions of russia. who moved to dagestan earlier and became part of the chechen terror group. plotnikov was killed by russian authorities in july of last year. tsarnaev last the country two days later for boston. russian authorities asked the u.s. to investigate tsarnaev two years ago, but did not provide specific new details until after the marathon attack. president obama said today he's asked for a full int

abc's chief investigative correspondent, brian ross, brings us what's changing tonight. >> reporter: at one school in massachusetts, students get what is called skin shock therapy. [ screaming ] in kentucky, a mother found her autistic 8-year-old son had been stuffed in a therapeutic duffle bag like this one. and across the country, abc news found schoolchildren, as young as 7, put in padded rooms or cells specially made for children said to be out of control in class. regarded as barbaric by some educators, but legal in most states. >> it's scary, really scary. even for the bravest person in the world, it's still really scary. >> reporter: but when lesley noyes of arizona discovered her second-grade son in this padded cell without her consent, she made a secret cellphone video and launched a public campaign to stop their use. >> it breaks my heart. it really does. that's what caused me to want to fight this fight. >> reporter: last week, success, as the arizona legislature passed a law restricting the use of the padded cells without parental consent. the arizona governor says there

and abc's brian ross tells us now what they're learning about his motivation, his inspiration. >> reporter: with the injuries to his head, neck, legs and hand healing, the hospital today upgraded the condition of dzhokhar tsarnaev from serious to fair. so far the only word he has spoken is a grunted "no." at the same time, friends sought to upgrade his image. one posted this undated video on youtube, showing dzhokhar doing the robot dance with buddies on the wrestling team. hardly the anti-american islamic radical accused of following his brother in bombing the marathon. >> it does appear the elder brother was the driving force, that he was very angry at u.s. foreign policy. >> reporter: the younger brother told the fbi that he and his brother were inspired by the anti-u.s. internet preaching of the radical cleric anwar al awlaki. even though the american born al qaeda figure was killed in a -- more than a year and a half ago, his words still have power. here condemning the u.s. actions in iraq and afghanistan, which the younger brother said, became their motivation to attack. >> we have c

brian ross has the latest on the investigation. >> give me a kiss. >> reporter: only a few months ago that dzhokhar tsarnaev posted hithis video on line. the 19-year-old is outside boston confined by himself to a tiny cell. a taste of what awaits him if convicted of the marathon bombings. he doesn't have a life. period. his total existence is going to be locked down. >> reporter: meantime, fbi agents are widening their net and looking for possible accomplices of the two brothers in the bombing. >> some may have been involved in helping build the bonds. others may have been involved in helping radicalize the brothers. >> reporter: fbi agents press catherine russell, the widow of elder brother tamerlan about her knowledge of her husband's activities. agents left her house carrying evidence bags. and she was seen leaving with her attorneys who said she did not know about the bomb plot. [ explosion ] and the investigative threats continue to stretch into russia. at the same time, tamerlan traveled there last year, two key young leaders of a violent islamic group were killed by russian for

ross say the taxis are allowed to move around at this point. >> the city has been on lockdown. we have lindsay davis with us now in watertown. she has stepped away right now. is bon us?

abc's chief investigative correspondent brian ross is right there on the scene reporting the story all night long. good morning, brian. >> reporter: well, good morning, george. this is a fast-breaking investigation with a major breakthrough already. the recovery by the fbi of the mangled partial remains of one of the bombs that apparently failed to fully explode all made of a common kitchen item. crime scene technicians discovered the key components along the race route and sent

. >> abc's brian ross has been reporting on the story from the very start. he's back from boston in new york. and will join us in the studio with brand-new details on the younger suspect and whether he was a jihadist or a brianwashed teenager. >>> let's get to the exclusive account of the owner of the boat where he tried to hide. dan harris is in boston. good morning, dan. >> reporter: george, good morning to you. dave henneberry lives on this street behind me. it's still blocked off as a crime scene. henneberry became an instant folk hero when his story came out. and when people get to meet him for the first time this morning, i suspect they're going to like him even more. we're all familiar with his boat, but we haven't met the man himself, until this morning. dave henneberry giving an exclusive interview to ed harding, an anchorman at our boston affiliate, wcvb. >> i looked on the floor. and i see blood.

abc's brian ross is in boston with the exclusive, new details on the interrogation. good morning, brian. >> reporter: good morning, george and robin. the 19-year-old suspect has admitted his role in the bombings. speaking with or communicating with that special team of fbi agents who did not have to give him his legal rights. the suspect also revealed, cording to authorities, much of the how and the why of the deadly bomb blast. [ explosion ] for all the fear and drama that the attacks produced, the younger brother reportedly told agents, it was almost entirely done from the internet, homegrown, with no direction from overseas. they used an al qaeda internet description of how to make a pressure cooker bomb. >> they took a very simple recipe and targeted -- the boston marathon.

brian ross, abc news, boston. >>> and we're learning more about the bystanders killed in the bombing. one victim identified as a female boston university student from china who was attending the race with friends and friends and neighbors gathered at a vigil last night in the dorchester neighborhood where the youngest victim lived. third grader martin richard was remembered as a vivacious boy who loved to run, climb and play sports. a friend describes the close-knit family. >> whenever we would see them, they would all be together. whether it was at church, going to school, on the sports field, in the neighborhood and they were a very active family in our community, pillars of the community. an overused term, but not in this case. >> martin's mother suffered serious injuries in the blast and his 6-year-old sister lost a leg. >>> also being remembered, 29-year-old krystle campbell. killed at the finish line with her best friend. her dad remembered him as the light of his life. her mother appeared on the family doorstep yesterday telling everyone that the couple is heartbroken at the lo

brian ross on the ground in watertown right now. thousands of police converging on that small town and the other surrounding suburbs of boston. >> reporter: george, i would say not since september 11th of 2001 has it been a sense of powerlessness by the people who live in america that they are at the mercy of unknown terrorists, they've been asked in boston to stay inside, lock their doors, not go out. it's an astounding situation. they haven't really seen in 12 years. >> and, brian, we just heard pierre tell us a few moments ago about one of the killers, the suspect now dead, just walking cooley towards police. do the police have any idea in which direction the suspect number two headed when he was in that mercedes suv? >> reporter: they thought he took off. they thought they had surrounded him in here, but there's been reports since then of spotting him elsewhere and we're just about -- yeah. and we're about to get another announcement. le -- >> the chief the transit on his office.ent will brief you macllin. he will not take any s