The lack of a jury system doesn't necessarily make a dictatorship, but it DOES mean that all you have to do is corrupt an official to get the verdict you want and create the same kind of foregone conclusion you get in a dictatorship; juries can act as a check against that sort of thing. Corruption in office is practically a given in any country, so removing potential checks against said corruption is a BIG problem.
(Which, incidentally, is something that I think needs to be fixed in the US: appellate court judges need to be subject to recall, in order to give the people some kind of control over them when they abuse their positions.)
(Which, incidentally, is something that I think needs to be fixed in the US: appellate court judges need to be subject to recall, in order to give the people some kind of control over them when they abuse their positions.)