I was watching "Cold Case Files" last night and saw a piece on the unsolved Zodiac murders in California during the late 70s. They mentioned the canonical website for the issue, which has some great message boards with good discussions. Since this case has been around decades, the information is fairly old (and the prime suspect is dead), but it's interesting stuff. One of the few times I've watched a forensics show where they examined an unsolved case and wasn't pissed at the ending. Speaking of forensics, why do people watch CSI? The real stuff is far more interesting.