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

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

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,