Shaaliver Douse died of a single gunshot to his jaw after the confrontation in the Bronx.
Two officers with the New York Police Department were on foot patrol when they heard gunfire at about 3 a.m. local time. The officers responded to the scene and found the boy with a 9mm handgun firing shots at a fleeing man, authorities said.
Police released two surveillance videos Sunday evening that show a man they've identified as Douse, wearing a white T-shirt and jeans, fire at a group of men standing outside a bodega and then chasing after one of them. Police said Douse fired four shots in all.
The officers identified themselves as police and ordered him to drop his weapon, authorities said.
"The officers ordered Douse to drop the gun but instead he fired another round," NYPD Commissioner Raymond Kelly said at a news conference. "It is undetermined at this time whether he fired at the officers or a fourth time at the unknown male who had just run past the officers."
When he pointed his gun in the direction of officers, one of the officers shot him, police said. Douse was pronounced dead at the scene.
The two officers had joined the department in January. Douse's aunt, Quwana Barcene, told the New York Post the boy was an only child.
"It's not fair. It was my sister's only child. You shouldn't have to bury your child," she said.