That is a very black or white viewpoint of reality and potentially lessens the evidential standards for a conviction, even it could be argued to the detriment of the accused as lower standards for a conviction may result as it doesn't allow for the grey area between the black and white, which can be caused by purely circumstantial evidence brought to the trial by the prosecutor. The Scottish system also has the same 'Innocence Presumed' and is a public trial also, but it doesn't allow for TV media coverage and has other restrictions which may contiminate the legal process. The main difference though is that the Jury should not be swayed (or even at least partly influenced) by the media speculation and sensationalism of the trial process itself. A conviction must be made beyond a reasonable doubt, so in effect it is a balance of probability based on the evidence at trial not a binary state of truth or false. A third state should be equally plausible.

Not proven

The fact that even the trial jury is even being critised or even individual jury members harassed to the point of losing employment would be quite astounding under the Scottish system of law.

http://en.wikipedia.org/wiki/Not_proven