Ran across one of the Manson girls, Susan Atkins, while helping out at CIW from CRC-Norco. She was nice enough.
Individually, I do not know if the entire Manson family were a bunch of natural born killers. Having said that, as remote as their release may be, they have parole hearings, so they don't want to screw up. They had a big riot at Norco in 2010.