After the hearing, the head of the FBI's Boston office, Richard DesLauriers, issued a statement describing the FBI and Boston police department's work together on a joint-terrorism task force, where police detectives had access to a database with the details of the FBI's inquiry into Mr. Tsarnaev.

WSJ: Boston Hearing Delves Into FBI Alerts

"This information was put in a database, it was shared among different agencies, it was shared with a joint terrorism task force, and that's exactly what should happen, " U.S. Rep. Adam Schiff, D-California, told CNN.

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