Damn dude, that sounds like a bad deal and I think you're doing the right thing. If the old boy gets out of line again, play it cool, buy him a one way ticket to Montana to do some ATVing and fly fishing with your "cousin's Bwana and rockymtnchief." He won't be found again until he turns into oil. There's a lot of open land up here.
A gun is like a parachute. If you need one, and don't have one... you'll probably never need one again.