If he insists on repeatedly victimizing members of the public, and nothing our scientists and doctors can do will make him stop, then what other option is there

If he insists on repeatedly victimizing members of the public, and nothing our scientists and doctors can do will make him stop, then what other option is there? Even in our current system, such a person would just be in-and-out of jail for their whole life. What value does society get out of that, other than the incapacitation provided by his stints in the clink? I really can't think of any value to retribution, so if we write it off we are left with rehabilitation, incapacitation, and deterrence^: Rehabilitation: Doesn't work in this hypothetical scenario. Incapacitation: Works. When he is in prison he is unable to reoffend. Deterrence: Doesn't work in this hypothetical, because if it did then it could be seen as a form of rehabilitation. That leaves us with incapacitation. What else could be done? ^ http://en.wikipedia.org/wiki/Punishment#Possible_reasons_for_punishment* http://en.wikipedia.org/wiki/Punishment#Possible_reasons_for...