According to investigators, the teenager was riding his bicycle when a Lincoln SUV traveling east on 142nd Street struck him.
The impact sent him into another vehicle, a late model Chevy SUV, which was traveling in the opposite direction.
The first vehicle did stop, but Johnson's vehicle apparently kept going.
Police say she is charged with leaving the scene of a serious accident.
The boy remains at Columbia Presbyterian Hospital where he is listed in critical condition. The nature of his injuries are not known.
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