i'm ayman mohyeldin. breaking overnight. after spending decades in the bars, charles mansion cult leaders and master mind behind a string of murders has died. according to california's department of corrections mansion died of natural causes. 83 years old. schwartz has more on the man considered one of the world's most infamous criminals. >> reporter: the swastika on his forehead, unmistakable. wild jailhouse interviews, unforgettable. >> i'd take this book and beat you to death with it and wouldn't feel a thing. be like walking to the store. >> reporter: charles mansion. >> maybe i should have killed 4-500 people. then i would have felt better. >> started committed armed robberies at the age of 18. most of his early years were spent behind bars. >> i raised up in here. >> in 1967, he begged to be kept