Served as an ex-US Marine, Murphy became known as an impressive marksman. Having completed his work in the Gulf War, he went back home only to find out that his siblings were murdered by thugs. In the heat of the moment, Murphy armed himself with a Hunting Rifle, tracked them down and shot down 20 of them when the police arrived to arrest him and gave him a life sentence. The Umbrella Corporation overheard about his track record and enlisted him as a U.B.C.S. mercenary. He joined the ranks of the Alpha Platoon as a sniper.