Death sentence. Yes or no?

[Puppyroach]

Danman27 said:

Azuren said:
It would be an injustice to let him live. The penal system is about punishment. Should a regular murderer be sentenced to death? No. Life.

Should a serial killer be sentenced to death. You bet your ass

Why should the penal system be about punishment? Wouldn't it be more beneficial to society if it were about rehabilitation? 

This so much. You can never reduce crime rates if you don´t work with how to get prisoners back into society as productive citizens.