check out a guy named dennis potts. >> so, you put dennis's name out there?d. >> with that information, a producer from kfmb went to the home of dennis's parents. >> where was he the night of the murder? >> he was right here. >> and the police come and see you and you are thinking, what, he's going to give you a big thank you? what did you get instead? >> very angry. >> and you were not happy. >> no, not at all. i said, i can't have these details out there and if it means i don't tell you another thing until this thing is resolved one way or another, that is what i will do, because my obligation is to your daughter and her son. >> did she understand that? >> i think she did. >> reporter: they had not solved the case, but the crime lab did solve one issue, dana had been right, and a test would come out differently. moen's dna proved, he was the father of baby dean, and his dna did not match the dna sample that had been sent to the mail order paternity testing company. the crime lab said, that dna sample came from someone else. >> it was his friend, max horn, w