DOVER, N.H. (AP) – A former University of New Hampshire police officer has been sentenced to at least 20 years in prison after pleading guilty to molesting young boys.

Carl Sonne, 63, pleaded guilty to 15 molestation and pornography charges involving nine boys under the age of 13. The boys were under his care at his Rochester home.

He was sentenced Friday to 20-to-40 years in prison.

“You violated the trust in the most extraordinary way,” Superior Court Judge Bruce Mohl told Sonne. “There is not a sentence that can be lengthy enough for you.”

AP-ES-07-02-04 1401EDT