If you're talking death penalty, personally I disagree.

We just need to tighten up existing practices, and stop letting the violent repeat offenders out. But I'd much rather keep them in prison forever than kill them. Why? Because even executing one innocent person is monumental. Furthermore, and perhaps more importantly, it doesn't really work. Criminals often have low impulse control; the fact they might be executed won't stop them from doing the crime, so life in prison (if actually performed well) versus execution have very similar practical outcomes, but allows for someone to be freed on the rare occasions innocence can be proven. The next reason is just that I don't think the government has or should have the power to kill its people.

Frankly, I just don't see much, if any, value in the death penalty. I get it's a satisfying meme, but I don't think it actually helps anything. We just need to stop the revolving door policy in our current system.