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Ambitious attorney Jerry Ladimer (Lee Bowman), working for mob boss Matty (John Litel), gets a new mayor (Samuel S. Hinds) elected to help further his own political plans. When the mayor vows to destroy the city's organized crime network, Jerry has him murdered and frames a local business owner (Eddie Quillan) for the crime. But the city's new crime laboratory, run by Gordon McKay (Van Heflin) and his feisty assistant, Jane Mitchell (Marsha Hunt), can find evidence pointing to the real killer. Wikipedia