Thirty-Four MY PHONE RINGS PROMPTLY at 3 p.m. I answer it and hear Helen say, “Thank you so much for agreeing to see me, Dr. Markel.” “Call me David,” says a male voice who sounds about my age, maybe a little younger. He sounds like a nice enough guy but who can really tell? In my experience, most murderers look and sound like nice, normal people. “Please,” Markel continues, “have a seat and tell me how I can be of help.” “Thank you,” Helen says. “I suppose you heard that the police recently found the body of Donna Dupree on the Myer College campus.” “Yes, I saw that. Such a tragedy.” “You had Ms. Dupree in your ‘Computers and Society’ class, I believe?” “If you say so. I had a lot of students during my time at Myer.” “This is a picture of Donna from around that time. Do you recog

