The parish transfers of abusive Catholic priests, also known as priest shuffling, is a pastoral practice that has greatly contributed to the aggravation of Catholic Church sexual abuse cases. Some bishops have been heavily criticized for moving offending priests from parish to parish, where they still had personal contact with children, rather than seeking to have them permanently returned to the lay state by laicization. The Church was widely criticized when it was discovered that some bishops knew about some of the alleged crimes committed, but reassigned the accused instead of seeking to have them permanently removed from the priesthood.