Four “youths” who brutally gang-raped a 16-year old girl in a Berlin park and filmed it with a cell phone have been freed by a German judge: Shock in Berlin as suspected rapists freed.

The youths, aged 13 to 15, allegedly attacked their victim as she walked home from school in the Charlottenburg district which is generally seen as safe area with low crime rates.

While allegedly gang-raping the girl, the youths are reported to have filmed the sexual attack with a mobile phone camera. Media reports say the four later boasted about the rape to other school children and sent copies of the video to friends.

Police who detained the four earlier this week have so far not found any film footage of the alleged rape. There is suspicion the video pictures may have been erased and mobile phones of the suspects are being analysed by experts in a bid to retrieve any pictures. …

Adding to the potential explosiveness of the alleged rape is the fact that the four suspects are all the children of immigrant families, while the victim is German. The normally well-informed Bild tabloid said the suspects were two German-Turks, a German Russian and a German-Angolan.

Federal police statistics released on Monday show non-German youths under the age of 21 were twice as likely to be crime suspects last year than German nationals of the same age.

Officers in charge of the case are convinced the four youths carried out the gang rape and DNA tests are being carried out on sperm traces found on the victim.

Given the brutality of the attack, there has been anger over a decision by Berlin justice officials to order the youths be set free. The 13-year-old suspect is too young to be kept in detention under German law, but the other three could be held.

Berlin justice Senator Karin Schubert insists, however, that even youths suspected of violent crimes can only be kept locked up if there is danger they will flee justice.