Is the death penalty a successful deterrent and does it save the lives of innocent citizens? A question raised and argued for years in the past and still in the spotlight. For justice to be deterring, the severity of the punishment must outweigh the crime. With life in prison without the possibility of parole an inmate has no care if he kills again. This is very evident considering, "at the roughly 52,000 state prison inmates serving time for murder in 1984, an estimated 810 had previously been convicted of murder and had killed 821 persons and following their previous murder convictions. Executing each of these inmates would have saved 821 lives." (41, 1 Stanford Law Review, 11/88, Pd 153)
We can then look at the number of convicted murderers that are either released too soon due to cases being overturned based on past conviction. New laws brought on by judicial decisions in other cases or even escape. It's not the executions that reduce murder rates but the reduction of the number of murders.
Many other factors are argued about the death penalty including