Hamilton subsequently accompanied the gang on a string of lucrative, but chaotic armed robberies. On March 6, three days after Dillinger's escape, the gang robbed the Security National Bank & Trust Company in Sioux Falls, South Dakota. In the robbery, a motorcycle cop named Hale Keith was severely wounded when Nelson shot him down through a plate glass window. A week later, the gang robbed the First National Bank in Mason City, Iowa. Hamilton was wounded yet again shot in the shoulder by an elderly judge across the street, who also managed to wound Dillinger.