The Tulsa Police Department (TPD) is the principal law enforcement agency of the city of Tulsa, Oklahoma. It is a nationally accredited law enforcement agency by the Commission on Accreditation for Law Enforcement Agencies. It is the second-largest municipal law enforcement agency in the state of Oklahoma. The TPD was officially organized in 1907 after the City of Tulsa was incorporated. However, informally, TPD existed as early as 1905. The Tulsa Police Department was featured on Season 1 of Live PD, and then returned in Season 4.