Should Britain bring back Capital Punishment for Murder?

Some think the death penalty should be brought back because it is the only way of ensuring a murderer will not be released or escape and then commit more murders. This is true but one can never prove someone will re-offend, even if it is likely. Most murderers rarley re-offend It is said that it will bring down the murder rate because people would think about the consequences, this is the deterrence theory (the idea that if you are thinking about murdering someone, you will hesitate because your death will be the consequence). This does not work because when Britain abolished the death penalty the murder rate stayed the same, and when Canada abolished it the murder rate went down. But the United States have the highest murder rate in the world and they still have the death penalty. I think this is because firstly offenders think they will not get caught, and it is true only thirty percent of all murderers get convicted, this is a two in three chance of getting away with your crime. Secondly I think the deterrence theory does not work because it only applies to cases where the murderer has planed out the murder. It does not work with crime of passion. This is a spur of the moment murder. For example if someone caught their partner cheating, or caught someone in the middle of robbing their house, they would be enraged and by accident kill someone, without stopping and thinking about the consequences.

Also the death penalty is economical, some think that keeping a prisoner in jail for life is uneconomical and wasteful. Life imprisonment would expose prison staff and fellow prisoners to dangerous murders. It also allows tension and anger to build up inside the prisoner until they escape, are pardoner or let out on parole when all the anger and revenge can be let out and then more people might be murdered.