If individuals involved in terrible crimes such as murder or homicides are not put on death row, people are bound to lose confidence in the court system. This will also add to other criminals’ belief that the court is more understanding towards a criminal than towards the victims or society. Life in prison means the convict has a chance of parole. This gives the criminal a chance to get back at those who testified against him. He can also take revenge on the victim's family. This leaves the victim's family living a life of fear, and loathe for the system responsible.
It is safer and smarter to kill those who have murdered before. If they were sentenced to a couple of years in jail, who is to say, they will not kill once more after getting out. There are many cases in which the killer got out of prison and they killed once more. There were no purpose behind their killings they simply were