"A man who beheaded and cannibalized a fellow passenger on a Greyhound bus in Canada..."

"... won his bid to leave the grounds of the mental hospital where he is being kept, a criminal review board ruled Thursday."

The board said the passes should only be granted if Li's treatment team believes his condition is stable and that it would be "appropriate and safe for him to leave the locked ward." He will have to be escorted at all times by a staff member and a security officer.

The crime occurred only 4 years ago.