 Shaffer's disappearance has been especially puzzling to investigators since there was no other publicly accessible entrance to the bar at that time.Columbus police have several theories about what happened; some interest and suspicion has been directed at a friend of Shaffer's who accompanied him that night but who has refused to take lie detector tests regarding the incident.While foul play has been suspected, including the possible involvement of the purported Smiley Face serial killer, it has also been speculated that he might be alive and living somewhere else under a new identity.