My issue with this is that the courts are not perfect. There are thousands of innocent men locked up today. Some say it could even be 5-10%. Not everyone gets a fair trial. Take Derek Chauvin for example. Better to let 10 guilty men go than lock up one innocent, which is a serious sin.
I'm favor of mutilation or death for repeat violent offenders if absolute certainty of guilt can be established, but often it cannot. Public acts of terrorism, however, are an ideal case for its application.
The best option is public whippings or canings though. Singapore is extremely safe because of it. If the state makes a mistake, the damage heals and financial restitution can still be made. The prosecutor can also be whipped, for example. False accusers, especially women who make false rape accusations, should also face serious punishment.
I've read one former inmate say up to about 25% in the US. I talked to my father a few days ago, he'd usually thought innocent people could be around 10% of those in Polish prisons, maybe more. He mentioned it since they get to keep their voting rights and that's the percentage of the prison vote the right gets- some presidential poll numbers just came out.
I agree guilt would have to be established beyond any doubt, as fair a trial as possible is a must. Though God knows the score as they say, people ought to do the best they can in the quest for justice. I don't know where to draw the line, in my mind nobody should be punished if the evidence is weak- let him walk, and let the course of life sort it out, with the reputation following him or her. To me it's more about annihilating danger, destroying a threat, stomping out the bad seeds, and I'm referring to generally low IQ street thugs for whom crime is a way of life (those are nothing like Chauvin), rather than intelligent and calculating psychopaths- e.g. a jealous doctor killing his wife's lover. What I wanted to say is with violent thugs, gangbangers, and professional bandits who cause grave bodily harm, and when there are victim survivors, or crime scenes with good forensic evidence, there are clear cut cases. Chauvin is a normal 'good citizen', I wouldn't mind him as a neighbor, I don't worship cops, the people involved in the justice system are probably not my friends (some Christian judges may be), but I nearly always side with them, in a system where people like him go to jail, we will never get what I advocate.
And when people worry about precedents, every malevolent government in history did whatever it wanted, and went as far as it did, without precedent, because they could; no precedent is needed when it comes down to that, and things deteriorate that much. The guys locked up in El Salvador I believe are known to be no angels- if executed, it wouldn't weigh too heavy on the society's conscience. I don't know- if they could be crippled for life, instead of getting the death penalty, if that would satisfy some Christians opposed to the death penalty, then again, pope John Paul II said what Bukele is now doing is the way to go, that the modern state can do without capital punishment while keeping the people safe.
If I were a surgeon I wouldn't take the job doing what I proposed, some people volunteer to be executioners though, and there are psychopathic doctors, and other professionals. I couldn't work in a slaughterhouse either, I always enjoy a steak. I think I'd kill anybody without qualms, if they had hurt someone in my family, as a Christian I shouldn't feel this way, but I'm vengeful, this wine I could get totally drunk on, but I guess it comes from my own strong aversion to criminal behavior, the more I hate it, the farther it is from who I am as a person, if I or my family are involved, the harder I want to go on the actual evildoer. Crippling dangerous criminals saves costs, but it's indeed barbaric- it wouldn't bother me I think, it's their problem not mine. In my ideal world most of them wouldn't live long enough to deal with the system, people of good will outnumber them, and could clean up the problem themselves if they were free to do so, and had the support of the government- the mob comes to extort you, you shoot them dead on the spot, set them alight with a flamethrower, whatever, friends and family can help, and your peers look at the surveillance video- OK, great job, nice shot, thank you hero of the day. Thou shalt not murder is the original meaning of the commandment, necessary killing is different when the life of your family is in danger, it's of course nothing to look forward to, and thankfully very few have to. And I'm all for restitution too whenever possible, instead of prison, it makes no sense to isolate non-violent offenders from society.
During the martial law of 1981 in Poland, many political prisoners were on purpose incarcerated together with hardcore criminals, a common strategy, like in a gulag. They have confirmed that when death penalty, known as 'the cap' in the prison slang [he got, they gave him], was on the books, it was an effective deterrent, and an important factor in future crime planning, it was hard to come across somebody willing to go do a wet job.
To add to the point about governments letting criminals run loose, that TV talk I mentioned I'd heard in the nineties was about drugs, which quickly became a bigger issue at that time. After Communism fell, the previously almost impenetrable borders became porous. Before, the importation of drugs wasn't easy. For comparison, along The Polish-Soviet border, on the Russian side, ran a strip of land- tilled every day to make footprints visible, and the armed guards with dogs would kill without thinking twice. The Austrian - Czechoslovak border also had an electrified fence- with many sections rusted, and in general disrepair due to the very few past daredevils willing to risk it.