What do Assistant DA's do?
District attorney
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Except in the smallest counties, a district attorney leads a staff of prosecutors, who are most commonly known as deputy district attorneys (DDAs). The Deputy who serves as the supervisor of the office is often called the Assistant District Attorney. The majority of prosecutions will be delegated to DDAs, with the district attorney prosecuting the most important cases and having overall responsibility for their agency and its work. Depending upon the system in place, DAs may be appointed by the chief executive of the jurisdiction or elected by local voters.