i honestly believe murderers should be sentenced to total life sentences, irrespective of there age at the time they commit the murder. & it's got nothing to do with deterrence, it's a question of justice.
a human life is a unique & precious thing, to wilfully & criminally take another human beings life is inescusable, there is no rehabilitation from death, there is no parole from death, so there should neither be parole or rehabilitation for murderers. by all means treat them humanely ( within reason ) whilst they live out there lives behind bars, but release them back into society all is forgiven?, i'm afraid not. to do so is an insult both to the victims family, and the victim themselves.
I think every case should be judged on its own merits. In the case of a violent attack then yes life should mean life. For smaller crimes, however unpleasant they may be for the victim, the criminal should be educated and an attempt at rehabilitation should be made.