Former official : FBI uses `` triage '' approach in checking out possible terror links . Rogers told NBC the agency `` did their due diligence '' but Russian authorities `` stopped cooperating '' when the United States sought further clarification . Sen. Rogers says the intelligence committee will hold a hearing as soon as last year . The FBI interviewed Tamerlan Tsarnaev 's before he traveled to the United States Tuesday . Some legislators question why Tsarnaev was n't questioned again on his return .
Former official : FBI uses `` triage '' approach in checking out possible terror links . Sen. Rogers says the intelligence committee will hold a hearing as soon as last year . The FBI interviewed Tamerlan Tsarnaev 's before he traveled to the United States Tuesday . Some legislators question why Tsarnaev was n't questioned again on his return .