The new lawsuit

Fred, Grace's brother, reveals how unhappy Grace was in marriage with Singh. The second trial begins and again the incriminating testimony of addicted star witness Copas from the first trial is used. Since Singh chooses not to testify himself this time, they read his fatal testimony from the first trial. It seems like a lost cause for Singh. Hans, after years of research, wants to meet Singh. He spends two hours with him in jail asking questions about the murders. Does Hans gain more insight into the events during this conversation with Singh?