Lawyers for a suspected Libyan militant charged in 2012 attacks that killed the U.S. Ambassador and three others have asked a judge to send him home.

The lawyers say the U.S. illegally captured and interrogated Ahmed Abu Khattala last year, and that the appropriate remedy for that is for him to be returned to Libya.

U.S. District Court Judge Casey Cooper did not immediately rule on the request.

Khattala was captured by U.S. special forces in a June 2014 nighttime raid.

He was then interrogated for days aboard a Navy ship while being brought to the United States to face charges in the Sept. 2012 attacks on a State Department compound and a nearby CIA annex.

The attacks killed four Americans, including Chris Stevens, the U.S. Ambassador to Libya.