I need some advice soon and I can't really wait a few days for an admin to put this in the help section.

Ok so earlier today my best friend's dog got run over and killed. I think he was about 4-5 months old. He lost another dog at the same age to parvo right before he got this one. He also just lost his fiancee so basically he has a lot of problems and is kind of unstable. Well he just called me up told me about it and started demanding that I give him my gun. Well I don't want to give him my gun so he can kill somebody just because they accidentally hit his dog. Now he's really pissed off at me because apparently since I won't help him kill someone he think I don't care about him or his dog. I tried to tell him how it was probably an accident but it's in his head that they did it on purpose. He's very stubborn and I can't really get him to calm down. Some drunk neighbors messed with him last night too so he's pretty pissed off and I think he might do something stupid like hurt someone or leave or I don't know. I think he wants to run away or something like that. I want to talk to him but it's starting to piss me off that every time I try to talk to him he just yells at me and hangs up since "I don't care".

What the hell can I do to get him to calm down?