Should I tell my friends brother in law that my friend is a pedophile?

Anonymous

Around a year ago my friend told me that he was feeling very guilty about something. I asked him what it was, and he said he dated an 11 year old when he was around 18. I thought he said that he was into minors as young as 6. His sister who I barely know has two young daughters my friend is around sometimes. I felt like I should tell his sister so I did. She said they would take precautions around him. I said that i THINK he was into girls as young as 6. I couldnt remember exactly, and thats what i told her. A while after telling her, I was beginning to sort of question my memory. Im 98-99% certain he told me he dated an 11 year old. I'm not so sure he said that he's into 6 year olds. In fact, i dont really think he said that anymore. At the time of telling his sister, I was sure, but as time whent on, I'm questioning myself. His sister is married, and I was thinking about telling her husband who I don't know at all. I'm reluctant though. I'm pretty positive about him dating an 11 year old, but im afraid that if I tell my friends bil that he will be like "yeah I know, my wife told me", and then he might be like "and he's into 6 year olds too?" I could say I'm not sure, but I said in the message to his sister that he was, so I could either say yes, or I don't know. I don't want to say no, because then maybe I would lose credibility and than they'd think him dating an 11 year Is untrue. At least that's what my therapist told me would happen.

Updates
1 y
In conclusion, I'm not sure any of it's true, but im almost my friend telling me that he dated an 11 year old girl is true.
Updates
1 y
I'm almost positive my friend telling me he dated an 11 year old girl is true.
Should I tell my friends brother in law that my friend is a pedophile?
2 Opinion