I can't believe this is happening! If I'm not mistaken, Bear and Mr Biggles were VERY close, and that's why you adopted them together. Poor Bear is going to be so depressed. I would NEVER be able to do what you are doing, and honestly I have mixed feelings about the whole thing. One one hand I understand he attacked someone, but on the other I wouldn't be able to bring myself to put down a dog like that. Oh, I can't imagine the stress you are dealing with right now.
I'm sorry for you, Mr Biggles and Bear.