Johnson's death penalty homework

I am agree with death penalty, because I think that some people are too bad. Although they are arrested and then sent to jail, their bad inherent quality is not switched anymore. The best and efficient way to eradicate bad inherent quality is death penalty. Some people may think that death penalty is too cruel. But I think death penalty is a best way to be a good man. In my opinion, life imprisonment is not a good way to murderers and rapists. Because when they behave themselves well, they'll be back to society and continue with murdering or raping. So death penalty is good for our security.