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S. mail agent in 1850 Dempsey, 2010. t was in the early 1850's that in partnership with Edward Rucker
he started up his on private detective agency, located in the North West of the country Dempsey, 2010. After only a year his partner left, at which time the firm
was renamed the Pinkerton National Detective Agency, with the tag line 'the eye that never sleeps' Dempsey, 2010. t was this slogan which led to the term 'private eye' to refer to private investigators Dempsey, 2010; Burstein, 1999. The agency was highly successful and became…… Many states, such as Virginia, are training private security officers in order to ensure smooth cooperation and coordination between security companies without police powers and the police and sheriff's departments.