The Seattle Police Department (SPD) is the principal law enforcement agency of the city of Seattle, Washington, United States, except for the campus of the University of Washington, which is under the responsibility of its own police department. The SPD is nationally accredited by the Commission on Accreditation for Law Enforcement Agencies. Law enforcement in Seattle began with the election of John T. Jordan as town marshal in 1870. The SPD was officially organized on June 2, 1869. Today it has a number of specialty units including SWAT, bike patrol, harbor patrol, motorcycles, mounted patrols, and a variety of detective units; Fifty-eight officers have died in the line of duty since the SPD's establishment. The SPD has been under federal oversight since 2012, when policy and procedural reforms were instituted after a United States Department of Justice investigation found that SPD officers routinely used excessive force. Patrolmen are represented by the Seattle Police Officers' Guild in labor negotiations. Command structure Chief of Police: Adrian Z. Diaz Deputy Chief: Chief Operating Officer: Mark Baird Assistant Chief–Patrol Operations Bureau: Thomas Mahaffey Assistant Chief–Criminal Investigations Bureau: Deanna Nollette Assistant Chief–Professional Standards Bureau: Lesley Cordner Assistant Chief–Collaborative Policing: Steve Hirjak Assistant Chief–Special Operations Bureau: Eric Greening Assistant Chief: Bryan Grenon Assistant Chief–Homeland Security: Captain Bryan Grenon Executive Director–Legal Affairs: Attorney Rebecca Boatright Executive Director–Administration: CAO Valarie Anderson Executive Director–Budget and Finance: Executive Director Angela Socci Executive Director of Strategic Initiatives: Chief Strategic Advisor Christopher Fisher Rank structure and insignia Sergeant Major Arnold "Arny" McGinnis (retired in 2012) is the only known SPD member to hold the rank.* Promotions After three years in patrol, officers can become candidates to transfer to a wide variety of specialty units and are also eligible to attend a weeklong detective school. After five years as a police officer, they can take a promotional examination. Every other year, civil service tests are administered for promotions. Tests are given for the rank of sergeant, lieutenant, and captain. Assistant and deputy chiefs are appointed by the chief from the management ranks. Officers may be promoted to sergeant after five years of experience with the department and passing the sergeant's exam. Lieutenants must have at least three years' experience as sergeants, and captains must have at least three years' experience as lieutenants. A bachelor's degree may substitute for one year of experience but can only be used for one promotional exam. History The