It's not even clear if the death penalty even works to pursuade people from comitting further crime. Death penalty is effective in US, but it has done little to discourage high crime rate. But then again, crime rate in Saudi Arabia (Where Death penalty is in effect as well) is kept at minimal levels. Maybe the crime rate is dictated more by the system and the processes involved within the administration itself.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~