It started with a map. And it's turned into a gruesome Valentine's Day discovery. Investigators, using this map, have uncovered hundreds of bones which are believed to be the victims of the notorious duo called "The Speed Freak Killers." The primary dig is in the town of Linden, just outside of Stockton. Today alone they found 700 bones and fragments. A convicted killer, who sits in jail, literally mapped out this location. NBC Bay Area's Stephanie Chuang reports from the Central Valley.
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1,000 Bone Pieces Found in Mass Grave
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