Mohammed G. Abdi, 27, pleaded guilty to second-degree assault and unlawful use of a weapon in the shooting of the 16-year-old boy in July 2015.
Police responded to the Pic N Save store at 59th Street and Prospect Avenue just after 2 p.m. and found the boy in the street with a gunshot wound in his left leg.
Witnesses told police that a store clerk had fired the shot. When officers contacted Abdi, he had a pistol in a holster in his waistband, prosecutors said.
During the hearing on Thursday, Abdi said he routinely wore a loaded semiautomatic Glock while he worked at the store. Other store workers also were armed. Besides working as a store clerk, Abdi also sold mobile phone service at the store.
Abdi admitted that before the shooting, he unholstered the handgun and placed it on the counter while he was being trained on how to set up mobile phone service for customers.
He moved to the United States from Somalia in 1999 and became a legal citizen in 2009.
A witness told police that she was talking to Abdi inside the store when Abdi yelled “No!” and fired a shot at the teenager, who ran outside and collapsed. Abdi wasn’t aware that the boy was hit by the gunfire.
Video surveillance showed the boy walking toward the exit as Abdi pulled a gun from his waistband and fired a shot, according to the documents.
The 16-year-old later told police that he put a bag of cookies in his pocket and started to leave when he heard the clerk yell, and he was shot. The teen reportedly sustained permanent nerve damage to his leg.
Abdi is scheduled to be sentenced Feb. 9 and faces up to six years in prison for the shooting and the weapons charge.