I want to know about the jury system in the USA. Do they decise that a person is guilty or innocent in all cases of crime? Would you let me know something abut 'Jury"? Thank you.

Answer 1

Probably most, but I wouldn't say "all."

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

For example, a person can choose to have a "bench trial" in which there is no jury; the person has chosen the judge to act in place of the jury.
http://en.wikipedia.org/wiki/Bench_trial

As with all Wikipedia search results, be sure to check out all the external links and further references at the bottom of each Wikipedia page.