>> i'd seen falls. it did not look like a fall. >> prosecutors have charged kathleen's husband michael with murder, telling the jury about his connection to another suspicious stairway death 20 years earlier in germany. >> do you really believe that lightning strikes twice in the same place? do you? >> now, michael peterson sits down with us to refute the prosecution's case. including that other supposedly damn death. >> they said, my god, there was blood everywhere. well, no. the german police didn't see any blood. the american military didn't see any blood. >> and then a clash outside the courtroom. >> pleading guilty -- >> actually, we're not -- >> you're pleading guilty. >> here again, dennis murphy. >> reporter: the state's case lasted more than two months.