Cameras show a man wanted for questioning near the 1300 block of Windrim Avenue in the city's Logan section back on June 29.
You see him pacing back and forth while holding a large duffel bag and a phone.
A few minutes later, that man is seen running from the other side of the street with a rifle in his hands.
Investigators say the victim was a 33-year-old man.
If you have any information on the crime, contact police at 215-686-TIPS.