Few if any murders carry the horrifying cachet of the Manson murders in 1969. The deaths of seven people on two nights at the end of a tumultuous decade combined all of the political and cultural baggage of the era — drugs, counterculture, celebrity, cults, and pure evil in the form of the perpetrators, especially Charles Manson himself. Combining mass murder and serial murder, the Manson Family has played on the imaginations of Americans for almost 40 years, while its members routinely apply for parole and get rejected. Now one of them faces death, although much different in nature than...