So, again, there are 4 main reasons to imprison someone who has been convicted of a crime - deterrence, protection, rehabilitation, and punishment. In this case, it's obviously not a deterrent - I don't think people are not becoming mass-murdering cultists because they look at the Manson Family and say, "Wow, I don't want to go to prison." I don't feel like she, at 73 years old, is a danger herself, although there is a slim possibility that she could inspire a cult of her own. She has met any reasonable definition of being rehabilitated - she's earned a bachelor's and master's degrees while incarcerated, and has generally made the right noises about guilt and such. So, punishment... Is that in and of itself enough reason to keep her in?