The evacuation happened at about 3pm on Sunday afternoon, according to police.
"It is during some type of outdoor stay in the company of personnel that the person deviates to the rest and a car picks up the person and leaves with the man in," says Rickard Lundqvist, press officer at the police.
According to Sydsvenskan, the man was sentenced to forensic psychiatric care after attacking a man with a knife.
The police have prepared a report on the promotion of escape.