A former Rockford rowing coach is pleading guilty to federal sex charges.

Police say 30-year-old Timothy Vallier of Plainfield Township is pleading guilty to attempted sexual exploitation of children and possession of child pornography, according documents filed in federal court on Tuesday.

Vallier was arrested earlier this year for taking videos of minors changing in a boathouse at the Rockford Public Schools’ Freshman Center.

He faces up to 30 years in prison.