Do you think there's never been an instance of an unfair trial in the US despite the codified right to a fair trial? A right is always just a declaration of as

Do you think there's never been an instance of an unfair trial in the US despite the codified right to a fair trial? A right is always just a declaration of aspiration and an accountability mechanism should said aspiration not be lived up to - it cannot by itself guarantee any outcome because implementation will always be imperfect.