Sean Sipes, 30, was shot and killed on March 1, 2012, in Philadelphia. The shooting took place outdoors, consistent with the majority of the city’s homicides that year, when gun violence accounted for over 85 percent of murders and most incidents occurred in public spaces.

No arrests have been reported in Sipes’ case and it remains unsolved. Authorities have said that many homicides in that period were driven by arguments, retaliation, and interpersonal conflicts, but the specific motive in this killing has not been identified.

Does anyone have information about Sean, where he spent time, or what happened that night?