I absolutely don't believe the penal system makes people safe after they serve their time.
> Is it because that once someone has committed such a terrible crime that they are inevitably going to be able to do so again, because they have the psychological profile to do it?
If a person killed someone without a damn good reason, why would I think they wouldn't do it again?
> Finally, does it mean that such a person is forever marked as fundamentally dangerous and unworthy of reintegration?
Correct. And maybe I'm caught up on the murder aspect. Murder isn't a small little crime. It takes a certain type of person to be able to intentionally murder someone. And maybe most of this thread can be summarized by: I think if you intentionally murder someone without a damn good reason you should spend life in prison. Right now, second degree murder can include that and often is not life in prison.