Ha ha ha ha ... having a distinct feeling of déja vu here .. almost word for word the messages I got from fuckface when I threw him out back in the late 1990s, after a two year 'relationship'. They're all so bloody predictable, aren't they? Name, you are doing BRILLIANTLY. Don't engage, don't email/text/phone/meet, apart from saying he has to communicate through lawyers.
Just one thing - you mentioned maybe getting him to pick up his crap when the Police were there, as in 9.15 p.m. ,because Police said they'll visit at 9 p.m. But please don't rely on Police being there on time and you don't want to be in a position when they haven't turned up but fuckwit has.
If he comes with his brother, be prepared for a perfect storm of crocodile tears, entreaties, accusations, apologies ,promises, thing-about-the-children, can't-we-make-it-work pleas, all sorts of tugging-on-heartstrings bilge ... as the fabulous MN saying goes, 'No' is a whole sentence. Absolutely refuse to engage - maybe best of all, leave it to him and his brother to sort out his crap while you stay in any room except the one they're in. Better still, get a friend to be with you.