Won't stand up. Has happened frequently, no previous attempt to seek help, no injuries, probably known about by lots of friends on both sides.

No witnesses, so boils down to her word vs. your friend's. Innocent until proven guilty.

Just like the numbers who say they are drugged. Every study has shown that the only thing they are "drugged" with is alcohol. But parents are much more sympathetic to "a nasty man slipped me something into my lemonade" than "I was rat arsed after 30 shots in 1/2 an hour".