Achieving Justice and Protecting the Community It is the mission of the District Attorney's Office to seek and do justice by assisting law enforcement and other public agencies in the investigation of crimes, prosecuting only those crimes which can be proved beyond a reasonable doubt, ensuring a fair trial for those accused of crime as well as for victims and witnesses of crimes, advocating to the public and to the Board of Supervisors necessary improvements to the criminal justice system, and educating the public by providing prompt and accurate information regarding the activities of the office and the administration of criminal justice.