“Unintentionally shot the bear” does not seem to support a self defense claim.
The other thing that has happened here in southern NH is that bear are constantly breaking into peoples chicken coops.
It goes something like this. People move out to the country.
They go to Tractor Supply and buy some chicks and a coop because they will get all the fresh eggs.
The coop eventually gets broken into by the racoon, then Mr Fox, W E Coyote, Mr Bobcat, and finally Mr Bear. Mr/Mrs Bear can become VERY AGGRESSIVE. This is why we DO NOT FEED THE BEARS, Yogi. Mr Bear totally destroys the coop and kills ALL of the remaining chickens. People decide to sell the coop on Facebook marketplace.
I have witnessed this dozens of times in the last thirty years. However, it has really increased since Covid when so many NY/NJ people moved to NH. These people seem to have no common sense. They have never lived in the country before. They also VOTE Democrat.