On the evening of May 31, 2015, 33-year-old Michael Collier was fatally shot on the 200 block of Engle Street in Chester, Pennsylvania, outside his sister’s home. Collier had just parked and exited his vehicle when an assailant ambushed him; his girlfriend witnessed a man in a white T-shirt and shorts firing at him. Chester police arrived about 9:46 p.m. and found Collier bleeding from multiple gunshot wounds; he was pronounced dead at the scene. Investigators determined he had been shot 15 times in a calculated attack.

Witnesses reported seeing Vincent Clark running from the scene and later identified him as the shooter. At trial a motive was presented tying the killing to a prior incident in which Collier was implicated in another person’s death. In January 2019 a Delaware County jury convicted Clark of first-degree murder and firearms offenses; in March 2019 he was sentenced to life without parole plus an additional eight-and-a-half to 17 years for the weapons convictions.

Did anyone who knew Collier or who was in that neighborhood that night see something that hasn’t been shared publicly?