Do you think that the dissenting juror planned all along to try convince the others? What were his methods of persuasion?

The 3rd juror refuses to agree with the others. We learn early on that he has a bad relationship with his own son, with whom he is no longer speaking. We are led to believe that this is a contributing factor to his prejudice against the defendant. He tries to project his own issues with his son and his racial bigotry onto the defendant.