here again is dennis murphy. >> tom bevel, the blood spatter expert hired by dr. under the defense attorney. as a last witness in the trial, he'd refuted a lot of the prosecutions findings and bolstered his client's case. then came the prosecutor, wes lane's turn to cross examine. now courtroom lawyers like to talk about perry mason moments when a trial is electrified, but are hardly ever happens. it did in this case, it didn't ever. the prosecutor tossed out an open-ended question. >> well, mr. bevel is there anything the states experts or the oakland oklahoma police department missed in their examination of the evidence? >> the blood spatter expert on the stand, on the payroll of the defense, hesitated before answering. >> i expected an objection when i looked at the defense table which was over on my left. there wasn't an objection so i answered and i said yes sir. >> there was a detail that the witness wanted to talk about. something he had noted and which would later be regarded as the atomic bomb of the trial of dr. john hamilton. it was about that bloody sh