Okay I know that the title is confusing, but I found out that someone I used to know is a sex offender. I want to tell people/post about it, but the way I found out about this is illegal (weird story for another time). I can't post their info directly without it being traced back to me and also to someone else involved that can get in serious trouble. I already know their name, address phone number etc. This person has blocked me. What can I do with this info, the details of what happened are actually vile and I want to really ruin them.