Disappearance of Brian Shaffer

In 2006, a medical student named Brian Shaffer walked into a bar near The Ohio State University and never walked out. The bar had only one entrance that the patrons and staff used to enter and exit and one emergency exit and both those exits had surveillance cameras. There was a dark construction site underneath the bar that led to the aforementioned emergency exit behind the building. Bloodhounds couldn't place him anywhere and he was also not seen on any CCTV footage around Columbus or Ohio State University. He was supposed to go on vacation with his significant other days after he had disappeared.