"Pinkerton Agency's list of most wanted"

The Pinkerton Agency was set up in 1850 in Chicago as a private security firm and at one point its members numbered more than the official United States Army. Known as 'Pinks' to their detractors, their activities were often controversial and included strikebreaking and union infiltration. Pinkerton agents were used widely to capture and kill outlaws in the taming of the Wild West.