after nearly 50 years in prison he was frail and from ill health. one of his friends told us he believes manson may be suffering from early stages of dementia, in november of 2017 charles man son died of natural kcauses. never even a show of remorse. >> i haven't done anything i'm ashamed of. guilty. hmmm. i wouldn't do anything that i felt guilty about. >> reporter: manson and his family still seem to occupy some dark corner of our imagination. but, said jeff guinn, it's time to strip away the mystery, and stop burnishing the legend of charles manson. >> we can't stop what manson did, we can't stop his fame. if he's notorious, let him be notorious for what he is -- this horrible sociopath. >> reporter: a small man, who used his talents, such as they