Justice should be swift and decisive. If there is no evidence, or it's circumstantial, the waiting just compounds the problems. If there is evidence, then waiting is a waste. Either way, the accused has a right to get the proceedings over with 'as fast as possible'.

Trial by jury should only be applicable when there is some underlying possibility of doubt. If you have enough solid witnesses, footage, or other irrefutable evidence, the proceedings should go straight to a resolution. People are innocent until proven guilty, sure, but they are proven guilty not always in a court, but when the evidence itself leaves no possibility of reasonable doubt. Give the system a fast-track, and it will improve. Save the long-drawn out proceedings for the really difficult cases.