The CCRB's core mission is to investigate thoroughly and expeditiously the thousands of complaints filed each year against New York City police officers. The agency also closes cases through its mediation process. The chart below depicts three important factors for assessing the agency’s productivity in processing the complaints it receives. Open Docket Size represents the number of open cases being processed by the agency as of December 31st in each year depicted. Case Closures represents the number of cases closed during each year depicted, and Total Complaints Received represents the number of complaints received in each year depicted.