. >> nobody has seen anybody like theodore kaczynski. >> the hunt for the unabomber. next. >>> a simple sketch was almost all investigators had to go on. the facial features were distinct, but the head was cloaked by a hood. and the eyes obscured by aviator sunglasses. for more than 17 years, he operated without restraint. in all that time, no one knew who he was or how exactly he chose his targets. even his victims remained in the dark until he struck. >> i had never heard of the unabomber before i was injured. i had learned about the existence of the unabomber two days after i came home from the hospital. >> february 20th, 1987. an unseasonably warm and sunny day in salt lake city. police and emergency personnel respond to a report of an explosion outside cam's computer services. owner gary wright had arrived at his office at 10:25 a.m. >> when i had pulled into the parking lot, i noticed there was a piece of wood over to the right-hand side near my secretary's car. two two by fours that appeared to be nailed together. i thought well, it's just a piece of scrap lumb

nobody has seen anybody like theodore kaczynski. c explore what's new. for 575 calories or less on our lighter fare menu. enjoy fresh tossed. go fish. and try our new rosemary garlic chicken at olive garden. >>> by the time the unabomber claims his third fatality, his bombs have become more effective. and investigators still have no idea who is responsible. but with the death of gilbert murray of the california forestry association, the case suddenly takes a surprising turn. >> within days, the unabomber sent letters to several people and claimed credit for the murray bombing and started talking about the notion that the terrorist group fc is going to send out a manifesto. and wants "the new york times" or "the washington post" to publish that manifesto. and if, in fact they do, the fc will desist from committing terrorist acts. >> two months later, the unabomber sends a 35,000 word manuscript to "the new york times," "the washington post," and bob gucion at "penthouse" magazine among others. it becomes known as the unabomber manifesto. >> there were man