. >> all units operating, 15 willow brook road, colts neck. evacuate the building. >> reporter: inside, the bodies of his wife jennifer and who they believe to be their two children. a source telling abc news investigators suspect all three were stabbed. >> unfortunately, sadly, each of these individuals were the victims of homicidal violence at some point prior to when the fire was set. >> reporter: it turns out, earlier in the day, ten miles away, the home of the victim's brother was also burning. today, police charging that brother, paul caneiro, with aggravated arson of his own home, saying he doused it with gasoline, then set it on fire "while his wife and two daughters were inside." no one was injured. police say the two fires are related, but they have not called caneiro a suspect in the death of his brother and family. the two brothers ran a tech company together. the victim, keith caneiro, was the ceo. >> and gio benitez joins us live now from colts neck, new jersey, where that family was killed. gio, so many questions in this case. t