The cause of death for notorious cult leader Charles Manson was acute cardiac arrest, with colon cancer as a factor. That's according to a death certificate obtained by TMZ, which listed respiratory failure as a contributing cause.

Did Charles Manson kill anyone personally? In the late 1960s he was the leader of a cult whose members murdered several people. Was he directly involved?

A new Netflix documentary presents a theory that Manson was possibly tied to a controversial psychiatrist who researched LSD, mind control and was linked to MKUltra.