this man decided, came to the conclusion that archie mcfarland was in his way and needed to die. >> the argued the evidence was thin, no blood, no murder weapon, no witnesses, and dna found under archie's fingernails, it had now been determined, did not match janos. >> even if everybody right away thinks that janos kulscar is the killer, there has to be proof beyond a reasonable doubt. >> of course gary mcfarland, as you know, had no doubt that janos killed archie. he told the jury about that awful december morning, when he discovered his dad dead on the driveway, and knew instantly who did it. >> i turned around, looked at my mom, and i said, "i can't believe [ bleep ] you know exactly what." she goes "i'm so sorry. i'm so sorry. i can't believe he'd do this. i'm so sorry, i'm so sorry, son" and she went hysterical. she lost it. >> so difficult to reign in the emotion, even all these years later. easier for gary to listen to the prosecution, present the evidence suggesting the man spot cleaned the knees of dirty pants to wash away just the blood, easier for him to listen to the prosecu