I'm sorry for your friend's daughter.Yes I did post something similar.
The reason is.... 17 years ago a couple I know, their 10 year old daughter was kidnapped, molested and raped for 2 days before being killed. The 39 year old, with two other prior molestation convictions received life in prison w/o parole. Meaning we have to pay(with our tax dollars) to house, feed, clothe, provide medical, provide dental, etc take care of him until he dies even if that's 40+ years.
In my opinion there is no justice in that.
How would it serve justice to kill him? That's the real question.
In a society that values liberty, any infringements on liberty - e.g. killing someone as the punishment for a crime - must be justified.
... so what's the justification? What legitimate goal do you think the justice system should have for this person that isn't served by life imprisonment?