The boy is charged with murder and two counts of criminal possession of a weapon in connection to the shooting.
Police responded on Wednesday afternoon to 751 Monroe Street, where NYPD officers found 54-year-old Darryl McMillan of Queens with a gunshot wound to the chest.
First responders transported the victim in critical condition to Kings County Hospital, where he died a short time later.
Investigators are still trying to determine the motive for the shooting.
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