In the 1960s and early 1970s a dizzying array of musical artists congregated in Laurel Canyon to create much of the music that provided the soundtrack to those turbulent times. But there was a dark side to that scene as well. Many didn't make it out alive, and many of those deaths remain shrouded in mystery to this day. Charles Manson was integrated into the scene more than most would care to admit, as well as various political operatives, up-and-coming...