It must be a challenge, for some, to evaluate this story. On the one hand, he believes a woman who gets drunk and goes to a private location with men has, obviously, consented to sex. On the other hand, he detests police.
Unnngh, the angst ...
And I plead guilty on that, as there is insufficient evidence to make a judgment on either side.
Certainly more information will be forthcoming. But my instinct is this will go nowhere as far as charges are concerned against the cops, for two reasons:
1) Gendarmes are Gendarmes, cops are cops, Bobbies are Bobbies, they all stick together. I don't think there will be sufficient evidence to disprove their story.
2) Awaking in jail and knowing you have just been... (well you know) often has a very sobering effect. (so I have been told).