The telephone calls remain a mystery, as Judy Aiello's number was unlisted. Theories on online forums have surmised that someone found Kemp's address book that he had left at the museum in Cheyenne, and phoned Aiello as a prank, while others have suggested that Kemp may have been abducted upon leaving the museum, explaining why Aiello was convinced that it was Kemp's voice on the voicemail messages.
