Jamir Thompson is accused of firing a gun at another person in April 2019.
The bullet struck 18-year-old Marilyn Cotto Montanez in the head and killed her.
Cotto Montanez was walking down Morningside Avenue with her 9-year-old sister when it happened.
Thompson, who turned himself in to police about two weeks after the shooting, is due back in court in September for sentencing.
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