This month marks 50 years since eight black-clad hippies snuck into a series of upscale Los Angeles homes and carried out the nine killings now known as the Manson Family Murders. Between July 25 and Aug. 9, 1969, the followers of cult leader and failed musician Charles Manson murdered pregnant starlet Sharon Tate and her four guests, stabbed a supermarket executive and his dressmaker wife, and gored a Ph.D candidate with a sword. Half a century out, the attacks continue to resurface in pop culture. Last month, Quentin Tarantino reimagined the Manson murders in his ninth feature, Once Upon a...