The teen arrived at the 25th Precinct with his mother and a lawyer Monday morning.
Justin Streeter, of Plainfield, New Jersey, was shot in the head at East 128th Street just east of Park Avenue.
[Ads /]
Police got the call for shots fired just before 4:30 p.m. July 20, and arriving officers found Streeter, along with a 15-year-old boy who was shot in the leg.
Authorities say Streeter was shot while saying goodbye to his old Harlem neighborhood.
Detectives believe the suspect and the two teens had an ongoing dispute linked to gangs.
Streeter's family recently moved to Plainfield for a better life.
Neighbors say the shooting is part of a disturbing pattern.
"The area has been getting aggressively violent over the years," one resident said. "I've been this in area about nine years now. Since the economy has been tanking, the community has been in revolt."
[Ads /]
Police acknowledge how bad it's gotten.
"What about the parents? What about the families? What about the grandmothers out here?" NYPD Chief of Patrol Jeffrey Maddrey said. "This is terrible, and we shouldn't have to suffer through this gun violence. New York is so much better."
MORE NEWS: New York City correction officers charged after attempted suicide at Rikers
NYC correction officers charged after attempted suicide at Rikers
----------
* Get Eyewitness News Delivered
* More Manhattan news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube