So it went in a rural Wyoming church, where a man was accused of sexually abusing young girls hundreds of times in the pews during Sunday services. Though the preacher knew of the abuse, he never reported it to police, local prosecutors said. Instead, he told the man to seek therapy.

The abusers and victims all belonged to the Old Apostolic Lutheran Church, or the OALC, a Scandinavian-rooted revivalist church that teaches its followers that heaven is reserved just for them. To get there, according to current and former members, they must follow a strict doctrine, which emphasizes asking for forgiveness for their sins and says that being forgiven by a fellow church member washes away those sins.

What’s more, the church teaches that once a perpetrator is forgiven, anyone who speaks about the wrongdoing — including the victim — can be accused of harboring an unforgiving heart. Those who have left the church, as well as some who are still with it, say this means the burden of sin shifts from the person who committed the act to the person who refuses to let the matter rest.

Day and other prosecutors said one of the biggest obstacles to breaking the cycle is the way church members move among congregations spread across the U.S. and Canada, often hundreds of miles apart but tightly bound by large, multigenerational family networks.