A 16-year-old boy was gunned down inside his apartment at a Brooklyn NYCHA complex on Monday, according to law enforcement sources.
A relative found the victim suffering a gunshot wound to the chest inside his living room in a fourth-floor unit of the Sheepshead Bay Houses located on Avenue X near Brown St. around 5:56 p.m., sources said.
Investigators believe the shooter and the victim — who allowed the gunman into his apartment — are acquainted, according to sources.
Medics rushed the victim to South Brooklyn Health, where he died, police said.
A neighbor said she spied the suspect through the peephole of her door as he was leaving the victim’s apartment.

“I thought they were friends,” said the neighbor, who asked that her name be withheld. “The boy who left just walked out like nothing had happened.”
She later watched as medics rolled the victim outside on a stretcher.
“He wasn’t moving, not nothing,” the neighbor said.
Cops are looking for a man standing around 5’7″ with braided hair, who was last seen wearing a black windbreaker, blue hat and black A6 sneakers.
