under president bush but stalled recently. Josh with the other top stories. We are learning more about the florida man shot and killed by the fbi while being questioned about his ties to accused... See More
under president bush but stalled recently. Josh with the other top stories. We are learning more about the florida man shot and killed by the fbi while being questioned about his ties to accused bomber tamerlan tsarnaev. Abc's senior justice correspondent pierre thomas tells us what went so wrong. Reporter: Ibragim todashev had come under scrutiny because of his ties to the suspected boston marathon bombers including phone conversations he allegedly had with tamerlan tsarnaev in the weeks before the attacks. On wednesday, authorities traveled to his apartment in orlando to interview him about that relationship and the murders of three men near boston. But during the interview, sources say, he lunged at an fbi agent in a violent confrontation. He fired killing him. I was completely blown away somebody was living here, this, you know, all this time that had something to do with the bombing. Reporter: Sources tell abc news todashev along with the tsarnaev brothers surfaced as suspects of the murdered men found on the 10th anniversary of 9/11 with their throats slashed. Used to live in boston, right, they used to hang out because an mma fighter, the other guy was a boxer. Reporter: Overmight a woman who identified herself as tsarnaev's former wife told abc affiliate wtv he's no murderer. We expected that they're going to come and question him. He wasn't even nervous because he is not involved. Reporter: So far no evidence tying todashev to the bombings but believe they're well under way in solving a cold case.
This transcript has been automatically generated and may not be 100% accurate.