How to explain to DS he won't see his father again?

[UtterClusterFluff]

This is a complex issue and I don't want to go into the details because they don't really make a difference to the outcome.

I have just found out my exP has been charged with a serious sexual offence. Due to the nature of it I do not want him to have any contact with DS who is 10.

They had a good but limited relationship with only a few visits a year due to distance. They did keep in touch via the phone in between visits though.

I don't know where to begin with talking to DS about this. I don't not want him to know what has happened at all. This isn't negotiable in my mind.

I just don't know how to say he won't be seeing or talking to him again.

Is it better to tell a version of the truth - as in Daddy has gotten into trouble with the police and we have to stay away from him? Or do I just somehow say that we can't see daddy anymore? I'm so confused. And so so angry but I don't want DS to feel any of that.

Please can someone help with what I should do?

Also be aware if there is sibling contact that the half-siblings may be told something completely different, e.g. that Daddy has gone away (possibly to some exotic location), or some people/ the Police have told lies about Daddy, or (if their mum goes non-contact) that he has died.