What began as a neighborhood party during the summer of 1942 led to the largest mass murder trial in California's history. After young Jose Diaz was found murdered near Los Angeles' Sleepy Lagoon reservoir, 600 Mexican Americans were rounded up by the police, 24 were indicted, and 17 were convicted. But thanks to the efforts of crusading lawyers, Hollywood celebrities, and Mexican Americans throughout the nation, all 17 convictions were thrown out...