If anyone has a dual two split persona it is Charlie Manson. In one report I heard, he acted calm and erudite with a women one minute and then got violent with her the next. In jail in his early years, he tried to get his followers in his cult to kill the president as well. He is your typical psychopath where he puts on a facade of being charming, intelligent, and plays a victim role and you'll start to believe it.
Some interesting things about Charlie is he was an aspiring musician and was quite a good Orator. I do believe the people he killed (Sharon-Tate murders) he mistaken for the people that got a music deal over him. He used his follwers to kill the people inside mixing the two groups of people up. He then wanted it to look like a racial killing to cover it up (talk about dementia).
He was a good speaker even though he shouldn't be out of jail. The way he conducts himself in front of the parole bored and his lack of remorse will never get him out lol.
Here's a youtube video of him making a speech (he was quite a good speaker astonishingly but his mannerism still smacks of insanity and dementia).
http://www.youtube.com/watch?v=uk54b_DSOi8