Do we know how severe the beating was? Does that matter with regard to criminal charges? The police saw the video and know who shot it, right?i picked up on the “Had I been there I would have done something” line as well.
The allegations of what happened that night are awful. There were no witnesses to the sexual assault, so the police failing to press charges without cooperation of the victim, while very unfortunate, is par for the course.
There were supposedly multiple witnesses to the beating, including the videographer. The police would not have needed cooperation from the victim if other folks would testify to the older females beating up the younger one. The videographer in particular with have reason to cooperate, and hold the older females accountable. Yet, no charges were filed in relation to that either. Hmm.
Edit: IIRC, the news reports say the police report noted a bruised eye and facial swelling.