A lawyer for the parents of JonBenet Ramsey released a tape of a 911 call they made after the 6-year-old girl was found slain, saying it shows police exaggerated evidence against them.
The tape was broadcast Tuesday on NBC's "Today Show" and "Dateline NBC."
John and Patsy Ramsey were under suspicion but never charged. They have maintained their innocence and said an intruder killed JonBenet, found strangled and beaten Dec. 26, 1996, in the basement of their Boulder home. The Ramseys now live in Atlanta.
Their lawyer, L. Lin Wood of Atlanta, said police had leaked a story that a 911 call made by Patsy Ramsey included a conversation of the Ramseys and their son, Burke, that contradicted their statements to police.
"Dateline" reported that the FBI, the Secret Service and two independent labs hired by NBC could find no conclusive evidence of a family conversation on the tape.
"The idea of this conversation was either an intentional fabrication or the product of a prejudiced mind," Wood said Tuesday.
The network also aired a tape of an interrogation in which Patsy Ramsey repeatedly maintained her innocence, despite a police investigator's assertion that scientific evidence proved otherwise.
Police Chief Mark Beckner did not immediately return a telephone message left at his house.
A federal judge ruled in a civil case in April that the evidence was more consistent with the intruder theory, and Boulder District Attorney Mary Keenan, who took over the case from police, said she agreed.
Keenan hired a detective last month to lead the investigation and said her office is consulting with experts and investigators hired by the Ramseys.