mr. ramsey did you kill jonbenet? >> no, i did not. >> mrs. ramsey, did you kill your daughter?no, i did not kill my daughter. >> it would take 12 years for the boulder district attorney's office to completely clear the ramseys and their son, burke. all the while, jonbenet's killer has never been found. >> you still feel like it's a cloud over your family name. because there are still people in the country who still believe, absolutely, that your wife is responsible. >> no doubt. and we could have the killer confessed, arrested in prison, and there'd still be 5 to 10% of the population. yeah, it was the father or. yeah, it was the mother. >> now john ramsey is working with director joe berlinger. >> someone killed this six year old child when a new docu series streaming on netflix. >> cold case, who killed jonbenet ramsey? you have to go deeper. >> you have to sort the dna we have today. and make more sense of it. >> we think the crime can be solved. we want to pressure the boulder police to test dna. jonbenet's blood was mixed with a foreign dna. we need to separate out those t

mr. ramsey, as i mentioned, you are in your 80th year and here you are and you weren't paid by joe for thisnk, what is this about, why are you doing this?>> well, for two reasons, one, i'm doing this for the sake of my children and my grandchildren, this cloud over our name needs to be lifted, they need to be able to close this chapter and move on with their lives. it is hard on them, and our family reputation has been tarnished and i'm going to do my best to clear it up for the sake of my children and today, fighting the killer is not going to change my life. i have lost jonbenet, that is not going to bring her back . i would like to close this chapter so we can be more addressed and at peace. i won't give up pressing the authorities to do their job until i see that they do their job and that has been the frustration for 25 years. with new leadership, we are hoping that the department will capitalize on the resources. >> and there's a new generation of true crime fans that have rediscovered the story, going down these rabbit holes on message boards and continuing to blame the family, conti