[Publius6961]

Once a murderer is in prison for life there is absolutely no incentive to not kill again.

Of course you are right.

Hence the "welded shut iron cage" absurdity.

[Brytani]

One other fact, Ted Bundy escaped twice from jail, his second escape allowed him to come to Florida. 11 more women were killed and a 9 year old little girl - he was executed for her murder and never killed anyone again.