Allan Pinkerton affiliated with the notorious Banditti of the Prairie. After observing their movements for some time he informed the local sheriff, who arrested them. This later led to Pinkerton being appointed, in 1849, as the first police detective in Chicago, Cook County, Illinois. In 1850, he partnered with Chicago attorney Edward Rucker in forming the North-Western Police Agency, which later became Pinkerton & Co, and finally Pinkerton National Detective Agency, still in existence today as Pinkerton Consulting and Investigations, a subsidiary of Securitas AB. Pinkerton's business insignia was a wide open eye with the caption "We never sleep." As the US
Baldwin–Felts Detective Agency but it is known that the company provided guards for railway and mine payrolls and accompanied coal trains into the coalfields. The company investigated train wrecks, robberies, and thefts. By the early 1900s, the agency had also undertaken detective work for both federal and state government agencies. The agency became known for crime-busting after it successfully tracked down members of the Allen family wanted in a shootout in 1912 at the Carroll County Courthouse in Hillsville, Virginia, which left the judge, the sheriff, the prosecutor, a juror, and a witness dead or dying. Though two of the Allens fled the