Oksana Grigorieva's camp is making a dramatic change in their legal argument against Mel Gibson — that she was the victim of the Oscar-winning actor’s attempted extortion.

The claim centers around the $15 million peace agreement that the Russian musician walked away from after failed mediation talks in May, which Breaking Celebrity News was first to report.

In the agreement, which Mel and Oksana both signed in draft form, she promised to destroy "evidence," including the hate-fuelled and expletive-laden tapes.

According to the document, Mel agreed to pay Oksana and their infant daughter, Lucia, approximately $15 million. 

PHOTOS: Oksana Gregorieva's Broken Teeth

In return, Oksana agreed to "turn over all 'evidence' and represent and warrant that all evidence has been turned over and all evidence will be destroyed in a manner agreed upon by both parties."

“Evidence” was defined as “recordings, audio tapes, emails, text messages, videotapes and photographs... of Gibson.”

Oksana's lawyer, Daniel Horowitz, told Breaking Celebrity News: "It is my understanding that attorneys are not permitted to take evidence of a crime and destroy that evidence, under Californian law."

He said, “Oksana felt that she was being threatened at the mediation and she felt she would lose her daughter and be arrested for making the tapes, if she did not sign the agreement.

"The fact that a room full of Mel Gibson's lawyers we