Pinkerton (detective agency) Pinkerton (detective agency) Pinkerton, founded as the Pinkerton National Detective Agency, is a private security guard and detective agency established in the United States by Scotsman Allan Pinkerton in 1850 and currently a subsidiary of Securitas AB. Pinkerton became famous when he claimed to have foiled a plot to assassinate president-elect Abraham Lincoln, who later hired Pinkerton agents for his personal security during the Civil War. Pinkerton's agents performed services ranging from security guarding to private military contracting work. Pinkerton was the largest private law enforcement organization in the world at the height of its power. During the labor strikes
Baldwin–Felts Detective Agency Agency. By then, strikebreaking work had declined. State and federal legislation outlawing the use of private detectives for the purpose of spying on or harassing workers, along with shifting public opinion, had made such detectives less useful to management in labor disputes. After the agency closed its doors, most of the company's files were destroyed or lost. The largest collection of extant files is housed at the Eastern Regional Coal Archives, in Bluefield, West Virginia. Baldwin–Felts Detective Agency The Baldwin–Felts Detective Agency was a private detective agency in the United States from the early 1890's to 1937. Today, it is