>> to find out, barbee showed the entire eight hours of alvin's police interviews to dr.l hayes-hammer, a forensic psychologist from the lsu school of medicine. >> come on, alvin! what happened? you don't know everything you say, do you know anything? you couldn't swim for 14 hours, alvin. >> i was very annoyed, actually, because it was obvious to me as a professional that alvin was incredibly slow. and that he was being taken advantage of. >> dr. richard leo, a professor of criminology and psychology at the university of california at irvine, agrees. >> this is an awful, awful interrogation. i think this is shoddy, poor police work, and i think these -- the detectives who conducted this interrogation should be retrained. and until they're retrained should not be permitted to do another interrogation. >> during the first day of police interrogation, alvin denied he killed tinky. >> never. >> come on, alvin. what are you going to do? say something. explain it. >> what you saw was an incredible amount of intimidation. over 100 times, alvin said that he did not do it. he was