Apparently O.J. Simpson is convinced that the rusty buck knife found on his former Brentwood estates has nothing to do with the murder of his ex-wife Nicole Brown Simpson and her friend Ronald Goldman, Page Six reports.

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Retired prison guard Jeffrey Felix, who befriended Simpson in Nevada’s Lovelock Correctional Center, tells the Page Six reporter that O.J. Simpson has a new saying, “If the knife is rusted, I can’t be busted.”

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“He thinks it’s a total joke. O.J. is laughing about it. He’s on top of his game,” says Felix, even comparing the fallen football hero to Muhammad Ali. “He says almost every construction worker carries one of those folding knives. Anyone could have dropped it.”

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Despite his clear lack of sensitivity, Simpson could be right. While law enforcement officials say the knife found would take several weeks to process, CBS News reported that Los Angeles police detective doubt the knife was used in the 1994 killings.

“The knife is common among gardeners and is too small to make the wounds that killed Nicole Brown Simpson and Ronald Goldman,” CBS News reports.

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