(CNN) -- Interrogators don't expect to have it easy with Ahmed Abu Khatallah, a Washington law enforcement official told CNN.
The suspected mastermind of the 2012 attack on the U.S. Mission in Benghazi, Libya, has had time to rehearse his story, the official said.
But an expert who has interrogated al Qaeda operatives thinks there's a good chance Abu Khatallah will crack, if interrogators punch the right buttons. Others have done so before him.
"Some were motivated by the uncertainty of the situations. Others were motivated, as they called it, (by) fatigue with the jihad life," former Navy intelligence agent Robert McFadden said.