No from me!
It is far more expensive to kill a criminal than to keep them alive, this is usually down to legal expenses, courts costs and the appeal process.
If a person is guilty of some of the more horrific crimes then death is an easy way out, there is no suffering in death, make them pay for their crimes and let them suffer as they have made others suffer.
People are still being given life sentences and then being proven innocent years later, You cant release someone once they are dead!
If I were ever sentenced to a term of life in prison, I would sooner have the death penalty, but not the lethal injection, it goes wrong to often with disastrous results!! Just hang me!