Relationships / Social services

If the dad has left the family home due to being convicted of domestic violence (only for lightly grabbing a foot) when will social services not be involved.

I've been told if he is to move back into the home baby will be taken away as he is "unsafe"

For example in 10 years if he was to move back (and not cause any trouble in that time) I assume that it wouldn't be an issue. But if it was in 2 weeks time then yes it would be an issue.

So when will they not think it is an issue again?