“I've known some people who've done things, things...” – Sam

I've known some people who've done things, things I've seen them do, that make me believe they deserve to die.

Okay, let's say these people do exist. Do you really want to be responsible for deciding, out of all of these criminals, who lives and who dies? Trouble is, nobody asked you. Because in this state, it's the Law that decides. It's the police officers and the district attorneys and the judges and they're human. When they're biased or corrupt or just lazy mistakes are made and people will die. And some of those people will be innocent.