Am I right to be worried?

[Hazelnutwhirl]

Someone I know has gotten engaged to a guy that has been in trouble in the past for harassment. They haven’t been dating long, he has now moved in with her, I can’t help but worry

Didn’t you post about this a few days ago?

How well do you know her? Is she a friend? I would tell her what you've heard about him and then leave it up to her what she does with that information.

Not unreasonable to be worried, but nothing you can really do except watch, listen and be available to your friend in case they need you. Being too vocal in your opinion or suspicions will lead to you being cut out or losing this person’s confidence.

Is it actually any of your business?

Well if your friend is in danger this is 100% your business.
Another thing is how far is reasonable to go in order to persuade this person to call it off.
Rather than talking this by text or hinting stuff in a causal way, it is better if you have one, and just one, conversation in which you tell in really clear terms what is worrying you. And try to include other trusted people in the conversation.

Your post is a bit vague really with you not saying how you no anything/anyone. So the chances are YANBU but it’s non of your business.

It’s my sister, sorry I am a bit vague, but I don’t know if she might see this.

That’s exactly what’s happened, she now won’t talk to us, just worried how it might all end badly, or could all be fine, it’s the not knowing.

If you have reason to be worried then search Clare’s Law- doesn’t need to be her that makes the application. If there is information that the police think she needs to know to make a decision then they will contact her to make a disclosure x

we have done that and the police did find something, although I don’t know what only my dad does.

I would say then that all you can do is be supportive and let her know you are there for her as hard as it is x