Long before people started speculating whether someone sinister was behind Michael Jackson's death, Hollywood had seen its fair share of unsolved mysteries. Radar rounds up 13, from the comedian accused of rupturing an actress' bladder—but never convicted—to the actress who was rumored to have let her teenage daughter take a murder rap for her. Click through the gallery for details on a few, or check out Radar for the full list. (More unsolved mystery stories.)