Oksana Grigorieva Will NOT Be Charged With Extorting Mel Gibson

A source close to the case tells us, "the battery charge against Mel will officially be filed on Friday morning. The DA's office will announce that the extortion case was rejected. There wasn't enough evidence to prove that a crime occurred."

The source also tells RadarOnline.com: "Oksana could speak at Mel's hearing on Friday afternoon. She could make a victim's impact statement, but at this point, it doesn't seem likely that she will appear."

Gibson will appear in court on Friday afternoon at the Airport Courthouse in front of Judge Stephanie Sautner.