When a passenger train crashed near Knoxville, Iowa, on Monday, May 24, 1909, J.M. Harrison, a detective with the Chicago, Burlington & Quincy Railroad, was baffled. Some clues led him to believe it was caused by a band of robbers who intended to steal valuables from passengers. Yet no robbery had taken place. It was an unsolved mystery for several days. But by Thursday Harrison and Knoxville’s deputy sheriff had two little rascals in custody.