The mystery of Michael Jackson’s mother’s disappearance was clarified Thursday with the release of court papers that said she was kept from communicating with outsiders while at a resort and was unaware she had been reported missing. Katherine Jackson declared in the documents that she learned she was the subject of a search when she accidentally heard a TV report. Before that, she said, she was kept virtually incommunicado without access to a phone or her iPad. She said her stay at the Tucson resort was unplanned, and she went there after she was told her doctor had ordered her to rest.