For or Against Death Penalty

There are two sides of death penalty, for and against. First of all it is much cheaper to execute than putting prisoners in jail because the noose caused £5000 while putting prisoners in jail cause much more. Over 138 countries abolished death penalty and 58 more countries are still having death penalty and Malaysia is one of them. There are some down side of death penalty as you're taking people's life away and did you know the money of the cost of the whole process are from our taxes?? This means that we are contributing to the death of the person who sentence death penalty :( I think that the death penalty should be kept for some cases such as mass murder, firearm etc