Read This: An interview with the author who could change how we view the Manson Family

In the official synopsis of the book and in the interview, it’s stated that O’Neill was actually meant to write a magazine article 20 years ago about the murders, which spurred this new investigation. It was jump-started by him finding new, “shocking” evidence that basically blew the official story of what happened out of the water. That, combined with the fact that Bugliosi was angered by O’Neill’s questioning, made him dig deeper, resulting in CHAOS.

“Those three men, West, Bugliosi and Manson, are of a certain time and place that might never happen again,” O’Neill told Longreads. “Those guys had secrets; they were sinister. Each of those three guys I became pretty intrigued by. I sometimes wondered which was the most evil of the three of them. I’m not sure Manson was.” To propose that someone might be more evil than a cult leader who brainwashed his followers to kill several people, including an eight-month pregnant woman, is a pretty bold claim. But considering all the praise it’s getting already, plus the thorough research behind it all, people’s perception of what happened might very well be swayed.

West was brought into the story because he was conducting research at the Haight-Ashbury Free clinic at the same time Manson frequented it. O’Neill points out some other sketchy things West was doing, and notes that things line up a little too perfectly. “I felt like everything that Manson did with his women was exactly what the CIA was trying to do with people without their knowledge, in the exact same time, at the exact same place,” O’Neill states.

Read the full interview here.