Yeah, that worked out well in the O.J. trial didn't it. Better yet, the only thing Al Capone did wrong was tax evasion...other than that, he was a saint.
See this is the difference that you do not understand. "Know" is not the same as suspect, feel, think, fancy, reckon, guess, surmise, conjecture, conclude, have a hunch, suppose, presume, deduce, infer, sense, imagine, fear, or your eye twitching.