Craig Roberts retired from the armed forces in 1999 with thirty years total service. He was awarded ten decorations for his Marine Corps service in Vietnam, where he served as a Marine sniper. He was also a career police officer with the Tulsa, Oklahoma, police department. An internationally published writer, he is the author of Combat Medic-Vietnam and Police Sniper, as well as the co-author of One Shot-One Kill, and The Walking Dead.