An Illinois State Police trooper, who is also a youth hockey referee, was arrested this week on federal child pornography charges.

John Giarrusso, of Haverhill, was charged with one count of receipt of child pornography in federal court, prosecutors said.

An Illinois state trooper who also served as a youth hockey referee was arrested on child pornography charges this week while at work at the agency’s Des Plaines headquarters, authorities said. Colin Gruenke,