Barry Scheck: Part of the evidence against Marion is that it appeared as though — before the era of DNA testing, forensic scientists would use what they called conventional serological methods, because people secrete blood group substances into their semen or into the vaginal discharge or saliva. So that would be analyzed to look for blood types, and also what they call conventional protein markers. And in Marion Coakley’s case, I believe — if I recall it correctly — they were saying that the only blood type that they got from the vaginal swab that was taken from the victim in this crime was blood type O, and Marion was blood type A.  So in theory, he could not have been a contributor, right, because he was blood type A.  So the prosecution put on a serologist, a good guy named Dr. Robert Shaler from the New York City Medical Examiner’s office, and said, “Well, is it possible that somebody could be a low level secretor?”  So even though they secreted blood group substances into their semen, but there was not very much, so you could get a false negative for the A.  And he said, “Well yes, in theory, that’s true.”  And that contributed to Marion Coakley’s conviction.  So we were given this case by our old public defender’s office in the Bronx, and Peter Neufeld and I, along with students, decided to work on it.