It was about 5 p.m. on a snowy March 5, 2015, when Wilson, 30, an officer for eight years and the father of two young sons, asked his partner, Officer Damien Stevenson, to stop at the GameStop store at 2101 W. Lehigh Ave. in the Swampoodle section of North Philadelphia. Wilson wanted to buy a new PlayStation 4 and game for his 9-year-old son as a birthday gift and reward for doing well in school.