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JAMAICA, Queens (PIX11) — A mother who was looking for her 17-year-old son on Halloween used an iPhone app to track him down and ended up at the police station.

The cell phone tracker led the worried mom to the 103rd Precinct in Queens, where “She literally came into the precinct…and asked ‘Is my son here?’ Deputy Inspector John Cappelmann told DNAInfo.

Police say Junior Robinson, 17, was arrested along with a 15-year-old girl after they allegedly stole a cell phone from their victim. Both teens were charged with robbery.

The unidentified 15-year-old girl was also charged with criminal possession of a weapon, as she allegedly threatened the victim with a knife, an NYPD spokesperson told PIX11 News.

Robinson’s mother called the teen several times that night for him to go home. After getting into trouble, the teen told Deputy Inspector Cappelman “I should have listened to her and I should have gone home,” the website reported.

This is not Robinson’s first arrest. Officials said he was arrested several other times since Sept. 15.