Sure, there are different degrees of crime, we all know that. Crimes of passion, crimes of greed etc. Of course I would find it easier to off a child killer than I would a guy who killed his business partner over money or a spouse who killed a spouse because he/she found their spouse in bed with someone else. There could be extenuating circumstances to many crimes of murder and the death penalty doesn't always fit. Because of this, I would not want to personally pull the lever. However, I believe that sex crimes against children where rape and murder are the outcome, should be dealt with in the most harshest, serverest way possible. There is no reasoning behind brutal child killing crimes other than a perverted satisfaction, if you will. I would rather have my tax dollars used to pay someone to put these kinds of people to death than to have my tax dollars used to house and feed them for the next umpteen years while they spend their time watching TV and playing on the internet.
So, to answer your question, yes I do believe that some who kill should spend the rest of their lives in prison and some other's should be put to death. Some crimes of murder do outrage me more than others. Sadly, in this day and age, nobody is spending the rest of their lives in prison are they? Perhaps our dissatisfaction and frustration with our justice system has now inspired us to revisit the death penalty.