With Quentin Tarantino's "Once Upon A Time in Hollywood" due to be released at the end of July, there is a renewed interest in Charles Manson and his murderous cult. My guest, Lis Wiehl, author of "Hunting Charles Manson: The Quest for Justice In the Days of Helter Skelter"  explains Manson's powerful influence over the wayward youth that flocked to the Spahn Ranch in 1968 and 69, and how he managed to convince them that committing murder would help spark a race war and a revolution. Learn more about your ad choices. Visit megaphone.fm/adchoices