When you play in a world-conquering, gazillion-selling band of Metallica's stature, you're bound to attract a few oddball fans over the course of your career. Still, the metal titans' most unexpected devotee is quite a doozy: Richard Ramirez, the '80s serial killer known as the Night Stalker. Metallica guitarist Kirk Hammett said Ramirez — the serial killer, rapist and burglar who embarked on a Los Angeles crime spree from 1984-85 and was sentenced to death in 1989 — was incensed when he heard the band performing at San Quentin State Prison in 2003, where they filmed their "St. Anger" music...