It's so sad as to what happened to your friend. I think eventually she will report it, but she may do so in her own time. When that will be you may not know and she may just do so without telling you right away.. There is a lot of shame in being raped because
some of the victims feel it was their fault that it happened, though I know that isn't the case with your friend.
Be supportive of her but I would just whisper to her to make sure she reports that other bastid that held her down because he is a participant also. Though he didn't committ the actual rape he helped!
I'll say a prayer for Tasha.....right now she needs comfort!