"Searching for a Killer"

Patsy Ramsey (interview tape): "We're still waiting to find the killer of our daughter."

(Voiceover) If you're like most Americans, you think John and Patsy Ramsey are hiding something in the murder of their daughter, JonBenét. But take a look at this:

Patsy (interview tape): "I didn't do it, John Ramsey didn't do it, and we don't have a clue of anybody who did do it."

(Voiceover) 48 Hours Investigates has obtained the never before seen police interrogation tape of the Ramseys.

John (interview tape): "Patsy and JonBenet were extremely close."

John: "There was a strategy that was put in place to put immense pressure on us to break us".

Voiceover): "We have new evidence and new leads. This detective was working for the DA, so why did he switch sides?

Lou Smit: "I don't think the Ramseys did it, and I think they ought to start lookin for the people that did."

Patsy Ramsey: "If our DNA matched anything significant, they would have arrested us in a New York Minute."

(Voiceover) 48 Hours Investigates "Searching for a Killer" it could change your mind. Next Friday.