The man was busy taking pictures with his camera of the teenager while she tried on underwear when the girl’s mum spotted the offending hand stretching out over the wall to the adjacent cubicle.
The incident occurred in a clothing store in central Linköping on Friday.
The mum took the law into her own hands and blocked the man’s path as he tried to escape from the store. The mum called for help and security staff came to her assistance.
The man was held while police were called. Police then confiscated the man’s camera, identified the man and then released him, according to local newspaper Östgöta Correspondenten.
The man is suspected of sexual molestation and/or molestation.