The Question and Answer section for 12 Angry Men is a great resource to ask questions, find answers, and discuss the novel.
Just to make sure.... Act II?
The knife represents the idea that facts are not nessaserily all that they seem. Initially the knife was supposed to be unique and hence lay guilt on the boy. Juror number 8 however, brings out the same type of knife and slams it on the table. He...
He reveals that him and his son are not on speaking terms. That he did everything for his ungrateful Son.