Letters filed in a case against the Catholic Church detail allegations of sexual abuse of students who attended St. Francis Mission on the Rosebud Sioux reservation. The plaintiffs says the letters prove the church knew about the abuse, but did nothing to stop it.
Source: Charles Michael Ray. “Letters Detailed Alleged Church Sex Abuse.” April 7, 2013. SDPB Radio. http://listen.sdpb.org/post/letters-detail-alleged-church-sex-abuse