It makes a difference who murdered him ...
- Vigilantes? I've no time for that.
- Family members of the murdered baby? Then I feel sorry that they've carried that burden with them for all that time, and now ruined their lives even further
... but, either way, it's not good for different reasons.
As for "Should we have the death penalty?", we know what the outcome would be if we had a referendum on it! Once again, I would probably be on the losing side to a bunch of intolerant motivated pensioners.