Nasir Marks was 18 and a senior at Overbrook High School when he was shot and killed on the evening of May 25, 2021. Two weeks shy of graduation, he had been preparing a senior project speech on diversity and planned to attend Kutztown University in the fall. After rehearsing, he put on a hoodie, took a bus to visit his girlfriend in West Philadelphia, and texted her at 7:15 p.m. to say he had arrived. Fifteen minutes later police found him on the 3900 block of Poplar Street with multiple gunshot wounds; he was taken to Penn Presbyterian Medical Center and died that evening.

Family described Nasir as a quiet, happy young man, active in the University of Pennsylvania Upward Bound program and a baseball player who avoided confrontation. They believe he may have crossed into a disputed territory. Authorities later reported the shooting was a case of mistaken identity involving members of a West Philadelphia gang known as the Young Bag Chasers; prosecutors identified two individuals named Crawford and Nolan as the shooters and a suspect was arrested on September 24, 2021.

Did anyone in West Philadelphia see Nasir that evening or have information about the events around Poplar Street?