Once an NFL hero, now a convict, O.J. Simpson has seen his fortunes fall in the 20 years since his wife, Nicole Brown Simpson, and her friend Ron Goldman were found murdered. But despite his dismal standing in the eyes of the public, there's someone else who Simpson believes is utterly "without integrity" -- veteran journalist Barbara Walters! Simpson made the dig during an interview conducted before his 2008 conviction for kidnapping and armed robbery, but the remarks were never made public — until now!

Simpson's rant was released as part of a new documentary compiled by his manager, Norman Pardo, called O.J. Simpson: In His Own Words. In the clip, a copy of which has been obtained by Radar, he complains about his ongoing issues with Walters.

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"First week I was arrested after Nicole and Ron's murders Barbara Walters on 20/20 — investigative journalism! — gave a report that Friday, that they learned my Hertz contract was up," he said, "…and they weren't renewing. They said my NBC contract, was up and they weren't renewing, and they learned that I was payin $55,000 a month in child support and alimony."

"Then Hugh Downs turned to her and said, 'Well that might give a lot of pressure on any individual and make them do some crazy things,'" Simpson recalled. "In other words, they gave America a motive."

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