Rudy Bladel, Railway Killer

Rudy Bladel was an oddity among serial killers in that he only targeted railroad employees. For an astonishing span of fifteen years, he terrorized railways with numerous random sniper murders. Disgruntled at being laid off from his job as a railroad worker, Bladel took out his frustration on the various people who worked in the Indiana rail yards for over a decade before he was finally caught. Why did it take so long to catch him?