A basic premise of American jurisprudence is that a person is presumed innocent until proven guilty in a court of law.
“‘The right to a lawyer is a pillar of American jurisprudence, but it’s a right we’ve only had since 1963,’ John Oliver explained on Sunday’s Last Week Tonight.” — Peter Weber, The Week (theweek.com), 14 Sept. 2015
Much easier to say law, though.