In all criminal prosecutions, the accused shall enjoy the
right to a speedy and public trial, by an impartial jury of
the state and district wherein the crime shall have been
committed, which district shall have been previously
ascertained by law, and to be informed of the nature and
cause of the accusation; to be confronted with the
witnesses against him; to have compulsory process for
obtaining witnesses in his favor, and to have the
assistance of counsel for his defense. Which statement best summarizes the purpose of the Sixth Amendment?