This is an old movie in black and white. I have watched this twice, the first time in my uni, and the second time in Australia. A teacher of my uni let us watch in a class to tech us body language of roles in the movie. At that time, we watched it with Mongolian subtitle and also I had bad English. The second time was great. Because I watched it even without English subtitle. I didn't understand every single word and got the main conversation. Awesome. Let me tell the plot of the movie.
It is all about Jury of USA that has 12 members and they judge guilty or innocent. In this movie, the jury consists of 12 men and they judge a boy who is accused of murdering his father. At the beginning, every member but one of the jury finds the boy guilty. The only man in favour of the boy tries to convince the others. He always looks at the scenario from different angle. Eventually, he manages to persuade everyone.