Witnesses have told Trinidad police a teenager was shot in the head while playing Russian roulette with his brother, but the family says a masked gunman shot the boy while he was skateboarding.

The 16-year-old was treated for a minor head wound and released after the March 21 shooting.

His mother, 37-year-old Lola Malczewski, was arrested Friday on suspicion of evidence tampering, contributing to the delinquency of a minor and permitting a juvenile to possess a handgun.

She's free on a personal recognizance bond. No phone number could be found for Malczewski and it wasn't known whether she had an attorney.

Police say witnesses told them the boys and their mother had been smoking marijuana, and that after the mother left them, each boy took turns pointing a pistol at his head and pulling the trigger.