Mel Gibson's ex agreed to $15m tape deal

But Oksana Grigorieva's lawyer calls her 'victimized'

Oksana Grigorieva signed a settlement deal worth $15 million to not release angry tapes from Mel Gibson, according to court documents obtained by The site says these papers are at the center of the L.A. County Sheriff department's extortion investigation.

Grigorieva agreed to destroy "evidence" -- "recordings, audio tapes, emails, text messages, videotapes and photographs ... of Gibson" -- in the documents. In return, she is to receive a one-time payout of $1 million, $10,000 per month for the next 18 years, a $1 million life insurance policy on Gibson, the rights to their Getty Images photo deal, and the $17,112 profits from her album.

To raise their 8-month-old daughter, Lucia, she is also set to receive $50,000 a year for 20 years, $10,000 a year for 20 years to go toward college expenses, $4,000-a-month child support payments and a minimum settlement of $4.3 million with Gibson dies.

The document, allegedly negotiated in May, details how they will announce their split - by a "mutually agreeable press release" - and says that  there will be "financial penalties for non-compliance" if any details are leaked.

According to, Grigorieva refused to sign a the longer version of the document that would have given them 50/50 physical custody of their daughter.

Her lawyer, Daniel Horowitz, tells TMZ of his client, who is native to Russia: "When a person born in a foreign country comes to America, they look at the American justice system as the best in the world. You have a retired judge as a mediator and some of the best lawyers in L.A. in the mediation and you trust that what they are doing is lawful and proper... This truly underscores how victimized she was. Mel Gibson deserves better as well."

The Hollywood Reporter has said the Sheriff's department is dubious of a photo released in July that shows Grigorieva without her front teeth after an alleged blow-out fight.