The FBI suspects Tamerlan helped plot and carry out the terror attack with his little brother . They said Azmat Tazhayakov helped dispose of the Tsarnaev 's items . Tazhayakov brought hundreds of bombers before the public , prosecutors said . His lawyers said he did everything he could to assist the FBI . They said statements from him during questioning were coerced .
They said Azmat Tazhayakov helped dispose of the Tsarnaev 's items . Tazhayakov brought hundreds of bombers before the public , prosecutors said . His lawyers said he did everything he could to assist the FBI . They said statements from him during questioning were coerced .