March 13, 2014 10:52 AM EDT

Maryland Police charged two teenage girls with assaulting an autistic boy and recording him on cell phones performing sex acts, including with animals, CNN reports.

The St. Mary County Sheriff’s Department said that two girls aged 17 and 15 assaulted a 16-year-old boy with a knife on “multiple occasions,” kicked him in the groin and made him walk on a partially frozen pond into which he fell several times. Police also found videos of the boy on the girls’ phones.

A spokeswoman for the sheriff’s office told CNN that the boy’s parents said he was diagnosed with autism.

Lauren Bush, 17, and a 15-year-old charged as a juvenile face two counts of first-degree assault, two counts of second degree assault, one count of child pornography and one count of false imprisonment.


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