Life in Prison (Parole)
I am beginning to think both capital punishment and life without parole are immoral.
Our current system—which amounts to a lottery for poor defendants—is immoral, but the death penalty per se is amoral. It's all in how it is implemented, tho I'm doubtful that in the current social and political climate of the US that a non-immoral capital punishment system is possible.
The problem with the climate is that any high-profile crime is likely to result in the public demanding that the laws be made tougher and the punishment more severe. The same applies to the list of capital crimes. It becomes dependent on the immediate desire of the electorate and once on the list is near impossible to remove without intervention by a supreme court.
Perhaps the only way to make the death penalty less subject to immediate cries for retribution is to require that those crimes eligible for the death penalty must be constitutionally defined. The constitution can still be amended, but it's a more onerous process that passage of a law.