Cats are weird creatures, I've always had cats, they will stay in an abusive household just because its a place where they get food and shelter - and possibly affection and petting from other family members. You'd think the animal would leave, but it'll soon be 'sucking up' to him, trying to gain his affection - poor little thing!
All the same, it does need re-homing (far away) and he should be given a court order denying his right to own animals for life!
I, and most other people, would prefer he went to prison where he'd get an understanding of kicking from other inmates - but that just ain't gonna happen - is it? However much we hope it will!