Two German teenagers robbed a girl but accidentally left their own pictures behind for police on a discarded mobile phone.
After stealing a 15-year-old's shoes, money and mobile phone, the two older girls gave her an old mobile phone, police in the western city of Bochum said on Wednesday.
But the two 17-year-olds had forgotten the phone had their own photos, striking smiley poses, which police published online on Tuesday in an effort to find the culprits.
The two muggers turned themselves in almost simultaneously when the pictures appeared on the evening news.
Turning mugger is not normally a sign of great intelligence but these two really were NTB.