Billy Schmidt, 22, was shot and killed early Saturday morning in the 1900 block of Durfor Street.
In video released Wednesday, investigators said the suspects can be seen walking in the area of 20th Street from Ritner Street to Jackson Street before encountering Schmidt. They were also allegedly seen fleeing on foot in the area of 22nd & Porter streets after the shots were fired.
Philadelphia police release images of suspects in killing of Penn State student
Schmidt, a Penn State senior, was shot just yards from his family's home around 1:30 a.m.
RELATED | Penn State senior fatally shot near his South Philadelphia home; police seek suspects
Family members said he had been returning from a nearby bar where he had been watching the NBA Finals with friends.
"He was a really good person who cared about everybody and never hurt or bothered a soul, never bothered anyone and for him to get shot like that is a travesty," said Bill Schmidt, the victim's father.
Surveillance video captured by nearby cameras appears to show the moments leading up to the shooting. In one video, a man can be seen throwing a cell phone. Seconds later, another man runs around a corner with Schmidt chasing him. The gunman then turns around and shoots Schmidt in the chest.
Bill Schmidt said he later found his son's phone under a car and turned it over to police.
SEE ALSO | 'Justice for Billy': Vigil, protest to be held for Penn State student killed near home
"I'm shocked he chased them after they took his phone," he said. "From what we're told, another person came out and shot him."
Police are offering a $20,000 reward for information leading to an arrest and conviction.
Anyone with information is asked to call 215-686-TIPS.