What time did Marilyn die? A What time did Marilyn die? Based on body temperature and rigor mortis it is likely she died between 8pm and midnight. Time of death on the coroner report is listed at 3:45am and on the death certificate as 3:30am due to when the body was found. Related Back to Top Related Share: Next post: Where did she die? » Leave a Comment Cancel replyYour email address will not be published. Required fields are marked * Save my name, email, and website in this browser for the next time I comment.