A longtime friend of O.J. Simpson says the former football star will someday confess to killing his ex-wife and her friend.

Ron Shipp, a former Los Angeles Police officer, told the New York Daily News that Simpson is "in total torment today."

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Nicole Brown Simpson and her friend, Ron Goldman, were found stabbed to death in 1994.

Shipp testified in Simpson's 1995 criminal trial that Simpson told him, "I've had some dreams of killing her."

After a trial that captivated the nation and the world, Simpson was acquitted of the murders in 1995. However, Simpson was found liable for the deaths in a civil lawsuit in 1997 and was ordered to pay the families $33 million.

The 68-year-old is serving a 9- to 33-year sentence for a 2008 kidnapping and armed robbery. Shipp said he thinks Simpson could confess once he's released from prison, which could be next year.

"I hope one day he actually will rid us of all the doubt and all the conspiracy theories and say, 'Sorry I cannot go to prison (because of double jeopardy laws), but I am sorry I did it,'" Shipp said.

Interest in the murders of Goldman and Nicole Brown Simpson appears to have been renewed recently. A true-crime series about Simpson's trial premiered on FX in February, and a five-part ESPN documentary is set to premiere this month.

A retired Los Angeles police officer came forward earlier this year with a knife believed to have been buried at the Simpson estate.

Forensic tests later determined that the knife was not connected to the fatal stabbings.

This video includes clips from A&EMSNBCCNNCBS and ABC, and images from Getty Images.