A former assistant coach at a San Bernardino County high school has been charged with child pornography after school officials discovered a hidden camera in a girls restroom.

David Riden, 52, was arrested by San Bernardino County sheriff’s detectives on Aug. 25 after investigators determined he had placed the camera at Los Osos High School in Rancho Cucamonga. Detectives searched Riden’s Rancho Cucamonga home and vehicle and seized multiple digital media devices, authorities said.

The hidden camera, which was discovered by another school staff member, looked like a cellphone charger that had been plugged into a bathroom wall, attorneys said. But the gadget was actually recording images in the locker room and near the pool of female students, including members of the girls water polo team. Authorities say club teams and even community pool users could have been filmed.

Riden had worked at the school for six years as an assistant football coach and boys locker room attendant before the investigation. He resigned Aug. 24, the day before his arrest. In a court appearance last week, he pleaded not guilty to charges of felony possession of child pornography and two felony counts of using a minor for sex acts.

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