Stephen Anthony Mobley (July 13, 1965 – March 1, 2005) was a convicted murderer executed by the State of Georgia for the 1991 killing of John C. Collins, a 25-year-old college student working nights as a Domino's pizza store manager. On appeal, Mobley's attorneys advanced a novel argument that Mobley was genetically predisposed to seeking violent solutions to conflict. The case was described by Nature Reviews Neuroscience as "perhaps the most widely cited case in which defence lawyers used genetic factors in the defence of their client".