Lamont Mason, 20, was shot and killed in East Harlem on Sunday, September 27, 2015. At about 4:41 p.m. he was found unconscious at the Robert F. Wagner Houses with multiple gunshot wounds to his chest and legs. Paramedics took him to Harlem Hospital where he was pronounced dead.

Surveillance footage earlier that day reportedly showed Lamont in a physical altercation near the shooting site, and investigators said they believed the killing was retaliatory rather than random. Witnesses described three men fleeing south on Second Avenue immediately after the shots; those individuals were treated as primary suspects. No arrests were announced in the immediate aftermath and, by late 2015, the case remained unsolved.

Does anyone who lived in or near the Wagner Houses in September 2015 recall the altercation or movements on Second Avenue that afternoon?