(CNN) A 13-year-old suspect in the deadly stabbing of Barnard College freshman Tessa Majors told police he watched as two friends grabbed and robbed her before one of them slashed her, according to a published report.

Details of the crime emerged at a Manhattan Family Court hearing for the boy on Friday, according to the New York Times , which reported the juvenile is accused of felony murder for allegedly participating in the deadly robbery.

On Wednesday, when the popular 18-year-old college freshman was killed, the boy and two friends were at Morningside Park to rob people, NYPD Det. Vincent Signoretti testified at the hearing, according to the newspaper.

The trio initially followed a man but targeted Majors instead, the 13-year-old told Signoretti, the Times reported.

The boy said he watched as his two friends grabbed Majors and put her in a chokehold before taking items from her pockets, according to the detective. One young man slashed her with a knife shortly before 7 p.m., causing feathers from her coat to fall out, the Times quoted Signoretti as telling the court.

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