barry bench's daughter, katharine exstat, offered to help out. >> his daughter was a very courageousg woman who said, i want the truth. i want to know if my father committed this murder and if roy brown is innocent. she actually contacted us after our papers were filed in court originally and said if you ever need me, i'll give you a dna sample. >> the dna analysis confirmed what roy brown already knew -- that the saliva stains on sabina kulakowski's t-shirt had come from barry bench. >> the paternity testing showed that the john doe dna on the shirt came from the father of this young woman, katherine exstat, who was barry bench's daughter. >> unbelievably, when this evidence was presented to the court, the judge refused to grant a new trial. he said he had no proof that barry bench was katherine's biological father. >> you would think you would be home the next day. you wouldn't think people would drag this out. >> this is the kind of people i'm dealing with. >> with more prompting, the state of new york exhumed barry bench's body and took a dna sample. it conclusively matched the s