Ask him and then tell him you're not cool with it if it's true. You're making pretty big logical leaps.

No. You must report this to the police. You should not beat him up for if you end up killing him due to an accident you will end up in jail. If he survives he could sue you or have you arrested. I would try to record a conversation with him when he talks about his love for the children. You will already have taken pictures of the strange objects he has, tiaras, diapers etc. I would then take it to your district police office and show them your evidence. Make sure you make copies of everything. Do this soon for he may be harming children. If anyone sees anything wrong with my suggestion, please let me know.

You start by going to the hardware store and buying some rope. . .