[1][2] Shortly before he was scheduled to testify against Wilson and Terpil, he died of possible pneumonia in a cabin in the Shenandoah woods after refusing federal witness protection.
[3][4][5][6] Former Green Beret Luke Thompson told the press: "Immediately I knew that he was killed to keep from testifying before the trial that's coming up in Houston.
"[7][8] Mulcahy's autopsy was inconclusive, and failed to reveal the cause of his death.
[10] Mulcahy became obsessed with the case of Wilson and Terpil to the point where he began investigating the case himself against the wishes of federal prosecutors - which alleged that they were selling arms and munitions to the government of Libya and Muammar Gaddafi, as well as the Irish Republican Army and other terror organizations.
[11] Mulcahy was the second witness against Wilson and Terpil to die, with Rafael Villaverde mysteriously disappearing in the Gulf of Mexico not long before Mulcahy's death.