Philadelphia Police found a man dead in the hallway of a Fishtown apartment building and the alleged shooter still on the scene early Wednesday.
Gunfire rang out around 3:30 a.m. inside the complex at 1000 East Montgomery Avenue. Police and medics found the man on the floor of a second-story hallway dead from a gunshot wound to the head.
"We believe that the shooter and the victim did know each other," police Chief Inspector Scott Small said.
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The shooter cooperated with investigators and police recovered a semi-automatic gun, Small said.
The scene is right outside an apartment with children inside. Investigators took those children from that unit, police said.
No word yet on a motive for the shooting as investigators continued to question friends and family Wednesday morning.
The apartment building used to be a school, police said.