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n. slang for District Attorney. (See: District Attorney)
District Attorney (D.A.)
n. an elected official of a county or a designated district with the responsibility for prosecuting crimes. The duties include managing the prosecutor's office, investigating alleged crimes in cooperation with law enforcement, and filing criminal charges or bringing evidence before the Grand Jury that may lead to an indictment for a crime. In some states a District Attorney is officially entitled County Attorney or State's Attorney. United States Attorneys are also called Federal District Attorneys and are prosecutors for districts (there are several in larger states) within the Department of Justice, are appointed by the President and serve at his/her pleasure.