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
The No. 1 Ladies' Detective Agency the stories flow and the problems which face her clients. Mma Ramotswe starts up her detective agency when she is 34 years old, using the inheritance from her father to move to the capital city Gaborone to buy a house for herself and find an office for her new business. She feels a detective needs to know about people more than anything, to solve problems for them. Her story is told in the first novel from birth to opening the detective agency. Mma Ramotswe is a Motswana woman who is the protagonist in the series and the main detective. "Mma"