Murder on the Tracks by Bruce W. Most

When Joe Stryker, a burned-out, disgraced 1949 Denver street cop, discovers a body on the railroad tracks with a crushed skull and missing hands, he sees his shot at redemption. He believes the body is linked to the murder of his partner two years before, a murder for which Joe blames himself. But seeking redemption can come at a high price. Joe must not only hunt down a ruthless killer but tangle with Denver’s wealthy and powerful, a wannabe mobster, and his own police department, at the risk of his career, his marriage—and his life.