grand jury, Jury that examines accusations against persons suspected of committing a crime and, if the evidence warrants it, issues formal charges on which the accused are later tried (see indictment). It does not decide guilt or innocence, only whether there is “probable cause” to believe that a person committed a crime. Public officials (prosecutors and police) provide information and summon witnesses for the jury. The proceedings are usually secret. Some U.S. states have abolished the grand jury and authorize indictments by prosecutors.
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