CHICAGO (AP) — Illinois Attorney General Lisa Madigan on Wednesday issued a blistering report about clergy sexual abuse, saying that Catholic dioceses in Illinois has not released the names of at least 500 clergy accused of sexually abusing children.

The preliminary report found that the church's six archdioceses have done a woefully inadequate job of investigating allegations and in some cases did not investigate them at all or notify the state's child welfare agency. Madigan's office said that while the dioceses have disclosed 45 more names of those credibly accused, the total number of name...