Sean Mathis, 43, was shot and killed on January 24, 2012, in Philadelphia’s Germantown neighborhood. According to reports, he was sitting in his girlfriend’s car on the 5000 block of Tacoma Street in the late afternoon when he was shot in the back at about 4:40 p.m. Officers found him lying on the ground near the vehicle; he was taken to Temple University Hospital and pronounced dead at 6:41 p.m. that evening.

No arrests have been announced and investigators have released little information about motives or suspects. The case remains open and is one of several unsolved homicides from Philadelphia that year, a pattern that left many families without closure.

If anyone saw the shooting or has information about Sean’s death, please come forward to the Philadelphia Police. Who can help fill in what happened that afternoon?