It happened just after 1 a.m. back on May 23 on the 500 block of North 11th Street.
Police say four men were captured on surveillance video firing guns in the area following a large gathering inside an apartment nearby.
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A 21-year-old man was pronounced dead at Jefferson Hospital after being hit multiple times in the stomach.
Four other victims were also shot, including an 18-year-old woman and a 17-year-old female.
If you recognize any of these men or have any information about this shooting, contact Philadelphia police at 215-686-TIPS (8477).
You can also submit an anonymous tip online at PhillyPolice.com.
A $20,000 reward is being offered for information that leads to an arrest and conviction.