"The prosecution [of impeachments], will seldom fail to agitate the passions of the whole community, and to divide it into parties more or less friendly or inimical to the accused. The subjects of its jurisdiction are those offenses which proceed from the misconduct of public men, or, in other words, from the abuse or violation of some public trust, and they relate chiefly to injuries done immediately to the society itself."

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Convictions following the admission into evidence of confessions which are involuntary, i.e., the product of coercion, either physical or psychological, cannot stand. This is so not because such confessions are unlikely to be true but because the methods used to extract them offend an underlying principle in the enforcement of our criminal law: that ours is an accusatorial, and not an inquisitorial, system - a system in which the State must establish guilt by evidence independently and freely secured, and may not, by coercion, prove its charges against an accused out of his own mouth.

— Felix Frankfurter