Please help dox person who raped my 15 year old autistic sister.

[sambo]

I dont like to beg at all and i dont know where to ask. My sister has been messaging this nearby person online and today she was raped by him. She cant report to police in any way because she barely knows anything from him and shes being blackmailed so she wont tell police. I have his snapchat and phone number. if anyone can please help me i will pay