“‘We rely on those transactions,’ Mr. Lay said during the September meeting, according to Mr. Glisan. ‘They are imperative for us to hit our numbers and we will continue to do them.‘” Prosecutors begin to wrap up their case in the Enron trial with the testimony of former Enron treasurer Ben Glisan, Jr., who is currently serving a five-year prison term for his part in the fraud. (He created Enron’s “Raptors,” “four fragile financial structures…used to house assets and investments and to hide losses.”) According to the NYT, he “provided some of the strongest testimony against Mr. Lay heard by the jury so far.”