Hmm, I think that it needs to be tightened up a little. There's a bunch of info in the introduction which doesn't seem relevant nor addresses the issue of honest and thoughtful deliberation holistically. You may want to discuss the effects of people's biases, their perception of life, circumstances as to why they may or may not deliberate honestly. You may say, for example, "Twelve Angry Men, explores the extent to which jurors deliberate honestly and thoughtfully in regarding a criminal case where.... Though there are some characters who invest themselves in seeking the truth, there are others who are faced with their own problems that they let their bias cloud their judgement, therefore not being able to honestly deliberate...." Something along those lines would be better because it is a holistic approach to the text.
Also, I felt that the first sentence though having some relevance have no place in the introduction because it is a response to the essay not a question about legal studies.
You may want to discuss the duties of jurors, whether they perceive the deliberation to be a serious issue of sending an innocent man to prison or whether they do not care about the outcome of the case as their reliance on the evidence proves otherwise? Discussion about surrounding events, like the heat (I don't know if it's in the text but I've only seen this reflected in the movie so I might be wrong) or personal conflicts, conflicts with people different from your own, personal biases which make someone not fully consider the effects of their deliberation should also be considered.