To consider these huge red flags and cut contact?

[Anonynony]

I'm going to keep this as short as possible.

Basically I am one of those people that rightly or wrongly is super aware and worried about potential child abusers etc. Not in such a way that I've ever outwardly suspected anyone but I'm very protective for this reason.
I've recently been getting to know someone and in that time he has let slip two things that have now seriously made me think I should not continue with a friendship/relationship. Though I fear I could be over reacting given my paranoia. One is that in an old job something was found that somehow could have been perceived as child porn but it was just a joke email and no charges were brought. The second is that when he was younger he was accused of abusing a younger female relative but it was all swept under the carpet and only happened because the accusers mother had a mental illness. Though he isn't in contact with any of his living family

I probably won't update with any extra info but I basically want to know is my reaction to run away reasonable or am I being paranoid and weird?

Definitely trust your instinct, particularly if you have children

It's the no contact within the context of a serious allegation being made. If a sensible well informed family were all consistent that there was nothing in the accusation, I might be less concerned about it. If you have nothing but his word, I don't think you can dismiss that allegation nearly so easily. I know families get it wrong, I know sometimes false accusations are made (although not all that frequently), so it is difficult to be certain about it.

That said, I'd be a little concerned about anyone who had no contact with any of their family. Unless there's a good reason for it, it's unusual. I would expect that if you weren't close, or didn't particularly get on, you'd still have limited contact. I accept that sometimes cutting off family is a perfectly rational act of self preservation, but I would expect that there's always a reason for it.

Echoing what everyone else has said. Get the fuck out.

I think you shoul trust your instincts for this one. Those 2 incidents are big red flags.

I disagree that nc with family is also a red flag though. I think thre are lots of people who go nc for genuine reasons, not to 'hide' things.

When someone tells you who they are, listen to them.