A better way is to be proactive in getting evidence. Hide video recorders, audio recorders and collect semen samples or anything that links them to a sexual encounter with the minor. Do not let on you are suspicious or doing this. If you are the victim, do not let on you are going to expose them, or you won't get 10 feet out the door. There's a good chance they will set you up to take the blame for their crimes, so be very careful of that.