On April 7, 1994, Federal Express Flight 705, a McDonnell Douglas DC-10-30 cargo jet carrying electronics equipment across the United States from Memphis, Tennessee, to San Jose, California, was involved in a hijack attempt by Auburn R. Calloway, who the prosecution argued was trying to commit suicide. Calloway, a Federal Express employee, was facing possible dismissal for lying about his flight hours. He boarded the scheduled flight as a deadhead passenger carrying a guitar case concealing several hammers and a speargun. He tried to switch off the aircraft's cockpit voice recorder (CVR) before takeoff and, once airborne, kill the crew with hammers so their injuries would appear consistent with an accident rather than a hijacking. The CVR, though, was switched back on by the flight enginee