Two Catholic bishops who led a small Pennsylvania diocese helped cover up the sexual abuse of hundreds of children by more than 50 priests and other religious leaders over a 40-year period, according to a grand jury report that portrays the church as holding such sway over law enforcement that it helped select a police chief.

The 147-page report issued Tuesday on sexual abuse in the Altoona-Johnstown Diocese, home to nearly 100,000 Roman Catholics, was based partly on evidence from a secret diocesan archive opened through a search warrant over the summer. MORE