You’re only 3 months in. He isn’t your partner. You barely know each other. I would run as fast as I could. It is rare for children who are being abused to disclose it. It’s even rarer for them to have disclosed it about the same person, 3 years apart, if there isn’t something to it.
In my personal experience though (I have two family members who are in relationships with men who have sexually abused children - yes, two, if you can believe it). I don’t know about one of them, but certainly the other, he told her on their first date, also showed her all the documents related to the case.
I think showing them to her was all part of the grooming. He was looking for a woman who would normalise all this with him. The fact she didn’t bolt out of there the second he told her he was convicted of sexually abusing his child showed him that she could be brought around to his way of thinking. And as the years have gone on, she has. She’s a complete apologist for sexual abusers now. Has created a whole fake narrative about his ex wife and daughters, has continued to normalise him continuing to engage in sexually abusive behaviour (think, public flashing of children and adults). Thinks it’s fine and harmless. She has, as people have slowly learned the truth, lost all of her family (including children and grandchildren) and many of her closest friends. She’s now quite isolated and not very well respected anymore because she’s stood by this man when the red flags were absolutely obvious to everyone else.
You’re only 3 months in. It’s not worth throwing it all away for this guy.