Isaiah Coleman was 19 when he was killed late on March 25, 2015. Police and emergency responders were called to the 600 block of Airbrake Avenue in Wilmerding, Pennsylvania, shortly after 10 p.m., and found Coleman with a single gunshot wound to the chest. He was pronounced dead at the scene and the Allegheny County Medical Examiner’s Office ruled his death a homicide.

The shooting occurred outside a residence where Coleman had been with others, including Chaz White and DeShawn Hollinger. Accounts say White and Hollinger arrived earlier carrying concealed firearms; witnesses described the group laughing and joking before an argument between Coleman and White escalated and a single shot struck Coleman. Witnesses reported seeing two young men run from the scene. Investigators later recovered two revolvers hidden under a flat cardboard box near where Coleman was found.

Police arrested 19-year-old Chaz White and charged him with criminal homicide, carrying a firearm without a license, and tampering with physical evidence. DeShawn Hollinger, also 19, was arrested on weapons and tampering-related charges; police said he admitted helping hide a weapon but was not charged with the shooting. Prosecutors said Coleman bled to death from a gunshot that pierced his heart.

Did anyone who knew Isaiah or who was in that neighborhood that night see what happened on the porch or the two men running from the scene?