Need advice: My friend was raped *TW*

I’ll try to keep this as short as it can be.

I’ve got a girlfriend of mine who’s a couple years younger than me, she’s 21.

I live in a touristy mountain area and she wanted a break from school, work, etc so she came to stay in my town just working seasonally. She didn’t stay in my apartment but I showed her the ropes of the town and we saw each other often. She was newly 21 so she was always wanting to party and found a crew to hang with since I’m lame and don’t like to go out.

Anyway her mom recently reached out to me and told me that something happened when she was living in the area. I guess no one else knows anything but she broke down and told her mom.

I guess the guy is someone they hung around with a lot (I’ve met him before and never really liked him but I never considered that he was a predator). She said they went out that night and her and her friend went home kinda early. She was asleep when the guy (and a friend) came in. I have no details except her mom said she said “I thought I was going to die.”

I obviously will NOT bring it up to her that I know. She obviously trusted her mother. But her mom wanted me to give some sort of warning to the other friends in the group to try to prevent us from happening again. And now I’m just completely dumbfounded on how to help her.

Like I said I won’t be bringing it up... and I don’t need her to tell me either. But is there anything more you think I can do? How does someone even begin to profess something like this? Should I just reach out more so she knows I’m here to talk? She has a lot of friends but she’s always said that they’re just party girls, which is good but she doesn’t feel like she has a support system in them.

I just feel so angry at the guy and upset for her. She came here to get away from her life and was now returning with this to try to process and deal with.

I also don’t know how to talk to or ask the girls about this guy without sharing any extra info.