Which participant of the trial process usually holds a specific official rank?

explanation:

a trial judge has broad powers in his courtroom. the judge's decision is usually final for the duration of the trial, and the party's one special type of witness is an expert witness.

hello! : )

i think a judge or jury, as they preside over the court and is the central figure in a trial.

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~ destiny ^_^

c. the dred scott v. sandford case,