IE 11 is not supported. For an optimal experience visit our site on another browser.

Crucial, unreleased video implicates Dzhokhar Tsarnaev

03:57

Video from a restaurant surveillance camera shows Dzhokhar Tsarnaev walking toward the scene of the second bombing and slipping his backpack off, investigators say. In addition, the FBI says agents searched Dzhokhar Tsarnaev’s dorm room and found a large pyrotechnic as well as BBs, a white hat and a black jacket resembling what was worn in the bombing suspect photos released by the FBI. NBC’s Pete Williams reports.