Oksana Grigorieva on Ex-Bodyguard: 'He's a Liar'

We asked Oksana Grigorieva point blank this morning -- what she thinks about her former bodyguard taking Mel Gibson's side in the alleged assault case ... and calling her a "sexual sorceress."
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Oksana said, "He's a liar."

Unclear if she was referring to the sorceress stuff.