On the evening of March 9, 2021, 15-year-old Antonio Walker Jr. was walking with a cousin on the 5200 block of Pentridge Street in Southwest Philadelphia on their way to play basketball when a car approached, a window lowered and shots were fired. Antonio was struck, taken to Penn Presbyterian Hospital, and died of his injuries. Witnesses reported hearing laughter from the vehicle as it sped away.

Antonio was described by family as a quiet, thoughtful freshman at Freire Charter High School who ran track, loved science, was a vegetarian, and enjoyed watching painter Bob Ross. Investigators initially treated the shooting as random; detectives later determined it was a case of mistaken identity tied to a feud between two rival street crews, 02da4 and 524. Authorities focused on a silver Ford Taurus early in the probe and later announced arrests linked to the killing.

Anyone who knew Antonio, saw activity on Pentridge Street that night, or has information about the people involved is asked to come forward.