My take on it is this:
There are those who...never can be helped, and 'if' for whatever reason they did end up back on the streets, would not hesitate to kill and kill again.
Jeffrey Dahmer murdered at least 17 men and boys. His murders were particularly gruesome, involving acts of , necrophilia, dismemberment, and cannibalism.
There was no hope for this person, and the same with Manson.
If Hitler was found, and jailed after all we have seen he had done during the WWII , would we feel such empathy for him.
My opinion is, for certain people, they are more of a risk alive.
I do not approve of the death sentence what-so-ever for serious offenders, someone who has committed murder...but has changed over the years.
No Way.
But it has it's merits for the fraction of a personwho is truly a danger in the highest degree.