The pictured suspect shot and killed a 21-year-old man around 3 a.m. on Nov. 12, according to Philadelphia police.
Authorities said the victim was killed in the apartment building at 2137 N. 15th Street, just a few block from Temple University's campus.
The video seems to show the suspect standing in a doorway before cutting to show him run inside, apparently armed with a handgun. He appears in a hallway in the final shot, still holding the pistol.
Police note that he has tattoo on his left forearm and said he was wearing "distinctive clothing." A $20,000 reward is offered for information that leads to his arrest.
Anyone who can identify him is asked to call PPD at 215-686-8477 or submit an anonymous tip online.
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