VATICAN CITY (AP) — The Vatican put its former ambassador to the Dominican Republic under house arrest Tuesday after opening a criminal trial against him, the first time a high-ranking Vatican official has ever faced criminal charges for sexually abusing youngsters.

Josef Wesolowski had already been defrocked in June after the Vatican’s canon law court found him guilty of abuse and imposed its toughest penalty under church law: laicization, or returning to life as a layman.