PHILADELPHIA (AP) — The U.S. Justice Department has opened an investigation of child sexual abuse inside the Roman Catholic Church in Pennsylvania, using subpoenas to demand confidential files and testimony from church leaders, according to two people familiar with the probe. The subpoenas, served last week, follow a scathing state grand jury report over the summer that found that 301 “predator priests” in Pennsylvania had molested more than 1,000 children over several decades and that church leaders had covered up for the offenders.