Oksana's case goes to prosecutors

Los Angeles - Detectives on Wednesday delivered the results of an extortion investigation involving Mel Gibson's ex-girlfriend to prosecutors.

The district attorney's office will now decide whether to pursue charges against Oksana Grigorieva in the extortion case, and against the Academy Award winner on domestic violence allegations.

The Sheriff's Office previously concluded its investigation into whether the Braveheart star struck Grigorieva during a January 2010 fight.

Grigorieva waited months to report the incident. By then the couple had broken up and reached a confidential agreement regarding custody of their infant daughter.

Custody battle

That accord quickly failed, and the pair have been embroiled in a bitter custody battle in Los Angeles for months.

Detectives began investigating Grigorieva last year after Gibson claimed she tried to extort him while they were working out the child custody agreement.

Sheriff's spokesperson Steve Whitmore refused to say whether detectives were advocating that charges be filed in either case.

"We've given them our investigation," Whitmore said. "It was exhaustive, and we'll wait to confer with them."

Sheriff's detectives have reviewed the contents of Grigorieva's computer and obtained audio recordings filed in the child custody case.

There is no timeframe for the district attorney's office to make a decision on whether to file charges.