My Mum did jury service and she said half the people were complete idiots, saying that people voted him guilty 'because he looked shifty,' and completely ignored the advice of the experts in the trial.

My Mum was the only one to say not guilty, because you supposed to be convinced beyond reasonable doubt that they are.

Personal biases aren't the half of it, some people just lack logic and intelligence to deal with such a case, they'll vote guilty on instinct and don't care about the life of the person in question.

I wouldn't trust a bunch of randomers with my life.

Transparency is key

That sounds like a good idea. Mixing the strengths of the two systems. 6 Jurors with 3 judges overseeing the way in which the citizens contemplate over the verdict.

My father was called in for jury duty, but as soon as they found out he was an educated individual (IRS) they couldn't see the back of him quick enough.