Responding, Usman told the court that none of the names he called was a witness before the court. When he was asked if the six victims were interviewed in the presence of Mamu, the PW-6 responded in the negative. The witness told the court that he was not a vocologist, having not studied sound in higher institution. “Was it in the presence of the defendant?” Usman asked. But Usman told the court that they would rather apply for a date to open their defence, .