No. Because our justice systems are not perfect and it's unfortunate that even now people are being put into jail for a crime they did not commit. Bring back capital punishment and their is still that chance that an innocent person could be put to death for a crime they did not commit.
Without capital punishment, that innocent person would at least still be alive and still able to have people outside to collect evidence in his/her case, with the possibility of being released and compensated for being wrongly imprisoned. But, if wrongly accused and given the death penalty, well once your dead- your dead.
I'm all for harsher conditions for the more serious crimes though. Death just seems like an easy way out doesn't it? Well compared to rotting in a jail for life that is. A waste of money? not if conditions in there a made worse.