TUNIS, Tunisia (AP) — After months of asking, agents from the FBI questioned the only known suspect in the Sept. 11 attack on the U.S. consulate in Benghazi that killed four diplomats, the suspect’s Tunisian lawyer told The Associated Press Saturday.

Ali Harzi, a Tunisian, was detained in Turkey and extradited to Tunisia in October where authorities have said he is “strongly suspected” of being involved in the attack.