I didn't say or imply anything about criminals sentencing themselves. I said that, under your proposed 'window dressing' trial, anybody here who'd shot somebody would be put to death immediately.
It's that whole 'in the eyes of their peers' part that takes time and money. Our system isn't perfect - a few scumbags get out that shoulda gone to prison. But it's better'n anybody elses. Who is it in your system that decides there's 'no doubt'? I'm not worried about the criminal's feelings, I'm worried about his rights. Because once you take his rights, and the guy's next to him, and then the next guy, where do you stop? What you're proposing worked great - in the Soviet Union. And Iraq, and apparently Cuba.