Indeed there are three states. Guilty, innocent and not sure. A lot rides on it. A heinous crime must be punished (and most likely future ones prevented) but we

Indeed there are three states. Guilty, innocent and not sure. A lot rides on it. A heinous crime must be punished (and most likely future ones prevented) but we absolutely can't send innocent people to prison - and they shouldn't spend years under a cloud of suspicion. The police, CPS and the courts have a really difficult job.