"Cold fanged anger." That's one of many disturbing lyrics from the Rolling Stones' classic "Midnight Rambler." It's a song about a black-caped killer -- a knife-sharpening hit-and-run raper who'll smash your windows, put his fist through your door, and stick his knife right down your throat. That character sprang from the mind of Mick Jagger. And on December 6, 1969, the monster turned on its maker, turning a day of free music into a night of chaos and killing. This is the story of the murder at Altamont.