Philadelphia police are seeking the public’s assistance in locating four suspects wanted in connection with a fatal shooting that occurred during an after-prom gathering in the Spring Garden neighborhood. The incident took place in the early morning hours of May 23 on the 500 block of North 11th Street. According to investigators, a disturbance at the apartment rental escalated into gunfire, resulting in five individuals being shot. The deceased victim has been identified as 21-year-old Joseph Sumpter, who authorities emphasized was an innocent bystander with no involvement in the altercation. Four other victims, including a 17-year-old girl, an 18-year-old girl, and two additional individuals, sustained non-life-threatening injuries and were transported to local hospitals in stable condition. Surveillance footage captured four of the five suspects prior to the shooting, and detectives are currently reviewing the images to identify the men. High school students were reportedly in attendance at the gathering, though the specific school has not been disclosed. Investigators note that witnesses have been cooperating with the ongoing probe. Authorities are urging anyone who recognizes the suspects or has information regarding the shooting to come forward. Tips can be submitted anonymously online at PhillyPolice.com or by calling the Philadelphia Police tip line at 215-686-TIPS. A reward of $20,000 is available for information that leads to an arrest and conviction. The investigation remains active as detectives continue to piece together the events that unfolded at the neighborhood party.