List two claims that the boy made to defend himself,as well as explanations given by juror as to why they cannot be belive (lines 160-293)

In Act I, 4th Juror explains that, on the night of the murder, the boy bought a uniquely carved switchblade knife identical to the one used in the murder. The boy claims that he lost it that night, before coming home to find his father dead. The boys other defense was that he was at the movies when the murder occured. He did not remember the name of the movie and couldn't produce a ticket stub.