Hijacker Mohammed Ali Hamadi denied in a West German court that he headed the terrorists who hijacked a TWA jetliner in 1985, keeping 39 Americans captive for 17 days and killing a U.S. Navy diver. Hamadi also accused witnesses of giving false testimony after some said he gloated over the killing of an American passenger. “The testimony very often deviates far from the truth,” Hamadi told the court. “I was not the leader. . . .” Flight engineer Benjamin Zimmermann testified earlier that Hamadi pointed with pride to blood stains of murdered U.S. Navy diver Robert D. Stethem.