As to the girl being unconscious, I have read accusations that suggest a date rape drug was administered prior to the group assault, but police maintained it was too late for a toxicology report to prove that.

I've also read that the police claimed to have lost the video of a member of the "rape crew" joking about the attacks while the girl was still unconscious, that video was later uploaded to the internet by Anonymous, who - unlike the police - were apparently able to find it.

All a bit shady as said.