Thiel Detective Service Company Thiel Detective Service Company The Thiel Detective Service Company was a private detective agency formed by George H. Thiel, a former Civil War spy and Pinkerton employee. The Thiel Detective Service Company headquarters were in St. Louis, Missouri. The company was formed to be a direct competitor to the Pinkerton Detective Agency, but never achieved this status. The Burns Detective Agency was Pinkerton's largest competitor. The Thiel Agency was involved in infiltrating and breaking a number of labor union strikes in the United States and Canada, much as the Pinkerton agency was. After the Homestead Strike, the Thiel Detective Agency,
William J. Burns International Detective Agency Court later reversed William J. Burns' conviction. William J. Burns Plate 63 East 9th Street, New York, New York 10003 William J. Burns International Detective Agency The William J. Burns International Detective Agency was a private detective agency in the United States, which was operated by William J. Burns. It was headquartered in Briarcliff Manor, New York from 1969 to 1983. The Burns Agency was hired to track down Industrial Workers of the World (IWW) organizers in the aftermath of the Wheatland Hop Riot. Burns agents infiltrated the Industrial Workers of the World during an organizing drive in the copper