Teen gangbanger charged in deadly NYC shooting of 14-year-old pal killed during gun mishap  

A 15-year-old boy was arrested for the death of his friend and fellow gangbanger after the suspect’s gun went off while he was flashing it inside a Queens apartment Wednesday afternoon, police and sources said.

Jamuri Mezar, 14, was shot and killed in his Jamaica home at the Norman Towers during what law enforcement sources described as an accidental discharge.

The older teen brought a stolen 9mm gun to Mezar’s home and was showing it off when it fired, striking Mezar in the head, the sources said.

Mezar was pronounced dead on scene, police said.

His pal bolted from the apartment and left the gun next to Mezar’s body, which originally led investigators to believe the wound was self-inflicted, sources said.

Both teenagers were members of the B4L, or brothers for life, gang, sources said.

Other teens were inside the apartment at the time, the Daily News had reported.

One of the boys stayed behind with Mezar to open the door for police when they arrived, sources told the Daily News. Neither of Mezar’s parents owned a gun, they told the outlet.

The suspect was taken into custody Thursday morning and charged with manslaughter and criminal possession of a weapon, police said.

“I save people every day, but I couldn’t save my own son. I don’t know why God would do this to me. He was a beautiful boy,” Mezar’s mother, a registered nurse who was at work when the shooting occurred, told the outlet.

Another Big Apple teenager, Darrell Harris, was shot and killed in broad daylight on Tuesday when an actual gunman turned up at a water gun fight at a Bronx park.

Late Wednesday night, a 36-year-old woman was shot and killed outside of the Barclays Center in Brooklyn while the NBA was holding its annual draft inside.