(Newser) – A high school rowing coach in Michigan is facing up to 30 years in prison after authorities say he secretly took dozens of videos of female students changing in locker rooms, WZZM reports. According to MLive, 30-year-old Timothy Vallier allegedly admitted to filming girls through peepholes at the Rockford Crew House and Rockford Freshman Center multiple times per season starting in 2012. Police say they found around 100 videos on Vallier's computer. Some were labeled and sorted by at least 15 girls' first names. The others were in a folder marked "to be sorted." Police also say his computer contained child pornography apparently downloaded from the internet and search terms related to child pornography.

Vallier was arrested July 8 after two recent Rockford High School grads found a camera in a team car that police say contained footage of two girls changing in a locker room. The grads went to school officials, who contacted the sheriff's office. "It's horrific," the Rockford Public Schools superintendent tells WZZM. "I'm so sorry for the parents and the students." Vallier was charged with possession and attempted production of child pornography in federal court on Thursday, the Cedar Springs Post reports. The federal charges carry a stiffer penalty than the original state charges, which have been dropped. (Read more child pornography stories.)

