Jack served as a Sniper and Team Leader in 3rd Ranger Battalion and as a Senior Weapons Sergeant on a Military Free Fall team in 5th Special Forces Group. Having left the military in 2010, he graduated from Columbia with a BA in political science. Murphy is the author of Reflexive Fire, Target Deck, Direct Action, and Gray Matter Splatter. His memoir, "Murphy's Law" is due for a 2019 release and can be pre-ordered now.