Mortal Error: The Shot That Killed JFK
 Donahue first became interested interested in the story of the JFK assassination after being invited to participate in a recreation of the shooting as one of eleven invited marksmen and sharpshooters. Donahue eventually decided that the bullet that struck Kennedy in the head had in fact been fired by agent George Hickey from an AR-15 carried in a secret service car following the President's vehicle. However he also decided that a previous shot had already mortally wounded Kennedy before the head shot was fired.