Kristian Herzog to Be Deposed By Mel Gibson

Mel Gibson's legal team is gearing up to depose the rogue bodyguard who claimed he nailed Oksana Grigorieva and that she is lying about all things Mel.

The interrogation of Kristian Herzog, a twice-convicted felon is set for Friday. Accused of battering his ex, Mel wants the dirt he hopes will vindicate him.

"Gibson's camp believe Kristian will admit Oksana is exaggerating her version of events in relation to the domestic violence allegations," a source said.

Kristian Herzog (left), may be a key player in the Mel-Oksana feud.

Oksana Grigorieva has claimed the Oscar winner punched her in the head on January 6, 2010, at his mansion in Malibu, knocking two of her teeth out.

While she was holding their infant daughter Lucia, no less.

But Kristian Herzog, who has signaled a shift to Team Mel in recent weeks, may be ready to go on record saying she's a manipulative, distrustful liar.

Whether his testimony is believable itself is another story.

A source says that Oksana's legal team is not concerned about what Kristian will say, believing it is more of a distraction than anything damaging.

"He is not a credible witness," one source said.

"Here you have a convicted criminal who went out of his way, ingratiating himself into Oksana's life with the promise of free bodyguard protection."

"He declared his support for her, to supposedly switched camps and supporting Mel, all around the same time his romantic advances were spurned?"

A fair point, you gotta admit. There's also the whole thing about Gibson wanting to murder him that he supposedly went off about late last year.

Whose side are you on?