Pick up copy of Brown et al, Criminal Laws > Read > Plagiarize. It's much more efficient than plagiarizing the thoughts of other people who may or may not have read the thing for ages.
My comment on the matter would be that you should do some work on that essay question you've copied and pasted into the thread title, put forward some of your own views, and let us respond to them. Without expressing the remotest hint of interest in or effort towards the topic, it smacks of laziness. You are effectively calling for essay responses.
I don't have a problem with stimulating thought and helping to refine arguments, but it is a two-way process. I'm not going to spoon-feed you answers for your essay.
Some questions to ask yourself might be:
What is the rationale behind the jury system?
Are jury trials a safeguard on executive/state power? Do juries protect the liberty of citizens?
Does the jury system fulfil its purpose?
What is the history behind it? (Maybe have a look at the Magna Carta)
What are the differences between the way judges and juries think?
Can juries be trusted to be reasonable? Are they prone to emotional manipulation? Are judges better suited because they are detached machines of cold reason?
Is justice facilitated by the community passing a moral judgment? Is there are need to be in touch with the common standards of society?
Are more minds better than one?
Who is more impartial, a judge or jury?
Are there constitutional principles behind trial by jury? Do juries augment the rule of law?