JonBenet Ramsey Case: Who Was Patsy Ramsey?

A new documentary produced by Lifetime reexamines the possible evidence against Patsy Ramsey in the unsolved murder of her 6-year-old daughter, JonBenet. Patsy Ramsey and her husband, John, came under suspicion in the case but ultimately were exonerated.
5:22 | 11/04/16

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Transcript for JonBenet Ramsey Case: Who Was Patsy Ramsey?
Plain There is jonbenet Ramsey. It's now 20 years after her murder and we have a first look at a new lifetime documentary that examines her mother Patsy. Paula Faris is here with that. Hey, Paula. In this documentary you'll see interviews that you have never seen before as well as analysis of that 911 call. Throu asking the question could Patsy Ramsey have killed her own daughter and how her love of stage and theater may have helped her cover it up. In 199 of the murder of jonbenet Ramsey gripped the nation. Reporter: On the 20-year anniversary a fresh examination of the tragic death of 6-year-old beauty queen jonbenet Ramsey with an upcoming made for TV movie. Jonbenet was everything to me. Reporter: And a new documentary produced by lifetime. From the beginning, the police and media suspected one person, jonbenet's mother. Reporter: Which asks the question -- Who was Patsy Ramsey? Tragic victim or cold-blooded killer. Let me assure you that I did not kill jonbenet. Reporter: In 2008 the district attorney Mary lacy exonerate the 9 Ramseys claiming that touch DNA proved the suspect was an unknown male. But this lifetime special is now resurrecting big questions about whether Patsy Ramsey might have been jonbenet's killer starting with the ransom note found at the crime scene. One of the first detectives to arrive at the million dollar mansion that terrible December morning Robert Witson. The handwriting examiner said I need to show you something and he turned three or four pages in that notepad and at the top of the pad said Mr. And Mrs. And then started the letter "R." So at that point it looked like somebody had used that notepad to make a practice ransom note. And that notepad was Patsy Ramsey's. Reporter: Another decorative on the case Fred Patterson telling lifetime -- There were some similarities in the randwriting between Patsy's writing and the writing on the note. Reporter: Investigative journalist Jeff Shapiro who covered it for over a decade saying -- Would an intruder break in and try to copy Patsy's Rand handwriting or is it sheer owe incidence it resemble bes her. Reporter: It showcases her love of theater. Her chosen talent when she was a young beauty queen herself. Patsy practiced a lot. She worked on her characters and her vocalization and accents and all of the different things to create the characters. Reporter: The filmmakers raising the question could she have been acting all along to cover up a possible crime? There was a sense within the law enforcement community that because of Patsy Ramsey's background in entertainment, she was someone who has a grip on great theatrics. Now, let's remember that Patsy Ramsey did pass away ten years ago. We reached out to Lin wood who represent the family. Dan, you've been following this from the beginning, 20 years, part of this documentary. What do you make of this new information? This new information basically pokes a hole in the argument that it couldn't have been Patsy Ramsey because there was one unidentified male person's DNA both in John combafully's underwear and another spot in the long Johns and that was the critically relatively new piece of evidence. The authorities did this new type of DNA testing in 2007/2008 and they found what they told us publicly was a match in another piece of clothing jonbenet was wearing to this unidentified male DNA found in her underwear so the conclusion was, well, that must be the real killer. Now we learn, well, it's not so definitive That's the thing. It doesn't actively implicate Patsy but takes away this information that looked definitive about somebody else That's right. Because before and when the D.A. Came out in 200 and formally exonerated the Ramsey family, the main argument was, look, we've got this DNA which points to somebody else and now we learn, well, this could actually be DNA from multiple people and as a result it might have been transferred or gotten there. Do you think had we known this at the time she wouldn't have been exonerated? The D.A. Would tell you, no. The D.A. Would say it was based on the totality of the circumstances, but it does make it a little bit of a tougher argument to formally exonerate and I say that because there is still such a divide within the Boulder community and among the Boulder authorities about whether Patsy Ramsey might have been involved, could have been involved and so I think that to exonerate someone publicly you better have it sort of clear and convincing -- they would say -- Mary lacy and Lin wood would say we believe it's clear and convincing. What do the authorities do now? It's 20 years. What they do is publicly claim it's still open. They publicly leave it still open and this case will never be solved. Dan Abrams, thanks very much. Movie "Who killed jonbenet" airs tomorrow on lifetime. The holiday shopping alert. The best days to get deals that aren't Black Friday.

This transcript has been automatically generated and may not be 100% accurate.

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