Earlier quoted context omitted.
> Juries are generally charged with determining matters of fact; the judge matters of law. I've always found this deeply troubling. If the law isn't clear enough for 12 jurors to determine if an act was legal, then how is it possibly just to hold the accused liable transgressing it? I don't see much practical difference between this and ex-post facto laws. In both cases, a person can be convicted for an act that wasn…
It's not a matter of determining the law; more often than not it's determining who is lying. Sometimes this is relatively easy ("you left blood with your DNA at the scene") and sometimes hard (you have 3 eyewitnesses, they have 7 people claiming an alibi).
Not so easy when you realize that DNA labs are shockingly prone to making type II errors.