If any of you are afraid of being known, it can be anonymous. You can contact me privately at my personal e-mail. email@example.com You can also call the sex crimes hotline and remain anonymous (the detective said they will only take your personal info. if you are willing and no one will come to your home, etc.)
You can call with just tips or leads - if that is all you have, it is still worthwhile.
I know it can be intimidating, there is no need to expose you as a victim, we just need your testimony. No one outside the investigative team has to know.