It happened on July 10 just before 11 p.m. on the 1600 block of West Cumberland Street.
Video released by police shows the wanted suspect walking near a vehicle outside of the business. Moments later, you can see the gunman walk in and unleash a barrage of bullets, killing a man as he drops to the floor.
After the shooting, the video shows several others walking into the business and take a gun and several items from the victim while he's on the floor.
The male victim has not been identified at this time.
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No arrests have been made in the case.
Anyone with any information is asked to call police at 215-686-TIPS. A $20,000 reward is being offered for information that leads to an arrest and the conviction in the case.