Michael Jackson's doctor has apparently gone AWOL, TMZ reports. Authorities want to interview him but can't find him, sources say. Cops towed his BMW from Jackson's house last night. One source says the doctor gave Jackson an injection, possibly of the morphine-like drug Demerol, before he died. The LA coroner, meanwhile, has begun Jackson's autopsy, though results may not be known for weeks, reports the Los Angeles Times.