Paranormal investigator Daniel Rivera's cause of death has been revealed, Us Weekly can confirm. "The cause of death has been determined to be cardiac-related and is ruled as a natural death," a September 4 statement from the Gettysburg, Pennsylvania, county coroner read. "Mr. Rivera had a known history of cardiac issues, which were consistent with the [autopsy] findings." The note concluded, "We extend our condolences to Mr. Rivera's family and loved ones during this difficult time." Rivera died on July 13, 2025, while on the Devils on the Run tour with the Annabelle doll.