Pinkerton first became interested in criminal detective work while wandering through the wooded groves around Dundee, looking for trees to make
barrel staves, when he came across a band of
counterfeiters, who may have been 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." Allan Pinkerton gained public attention when he and his detectives successfully solved a vandalism case at the Old French Cemetery near Lake Michigan. There, they apprehended three medical students who admitted to committing the crime of grave robbing for medical research purposes. When the story was reported in the news, highlighting Pinkerton's role in the arrest, it brought widespread attention to his agency. The following morning, the Pinkerton office was flooded with new clients seeking his services. As the US
expanded in territory, rail transport increased. Pinkerton's agency solved a series of
train robberies during the 1850s, first bringing Pinkerton into contact with
George B. McClellan, then Chief Engineer and Vice President of the
Illinois Central Railroad, and
Abraham Lincoln, a lawyer who sometimes represented the company. In 1857, the
Chicago Tribune urged the city to dismiss its police chief and hire Allan Pinkerton in response to a surge in thefts throughout the city. In 1866, Allan Pinkerton achieved major success by capturing a group of thieves who had stolen $700,000 from a train safe. Through his investigation, he was able to recover $688,000 of the stolen funds. Pinkerton founded an organization that was revolutionary for its time. He hired the first female detective,
Kate Warne, and established core investigative principles that continue to influence modern detective work to this day. in 1862 Pinkerton was known to be a friend of abolitionist
John Brown. On March 11, 1859, he supported Brown by giving him $500 and a ticket on the Michigan Central Railroad to Detroit. He also attended the secret meetings held by John Brown and
Frederick Douglass in Chicago along with abolitionists
John Jones and
Henry O. Wagoner. At those meetings, Jones, Wagoner, and Pinkerton helped purchase clothes and supplies for Brown. Jones' wife, Mary, guessed that the supplies included the suit Brown was hanged in after the failure of
John Brown's raid on Harpers Ferry in November 1859. ==American Civil War==