Say you go to a family trouble run where the man is going to be arrested for domestic violence, and he's putting on a show so he doesn't look like a punk in front of his woman and kids. "Nobody's taking ME to jail! I'll kick your ass! You're just gonna have to KILL me!" Then he starts walking toward the door that you're standing in front of and doesn't stop when you tell him to.
I've been to dozens of calls like that and ended up fighting with men and women who were a lot bigger than me, and never had to kill any of them. Are you just going to shoot the unarmed guy a few times in the chest in front of his woman and kids and then tell the newspapers it was a "gunfight" because you brought a gun?