BROOMFIELD TOWNSHIP, Mich. (AP) — As police frantically worked to figure out how his fiancée's 24-year-old daughter had vanished, a Michigan pastor who had turned to God to shed his violent past went to his flock with a request: pray for her.

But all along, authorities say, he knew the sordid truth about where the young mother was.

The pastor, ex-convict John D. White, later confessed to killing Rebekah Gay to fulfill a fantasy of necrophilia, police said Friday. White drank four or five beers before going to the woman's mobile home and repeatedly striking her head with a mallet and strangling her with a zip tie, according to court documents.