The Oksana Grigorieva extortion investigation is still weeks away from being completed, because downloading her data has become quite the time-consuming thing.
L.A. County Sheriff's Department spokesperson Steve Whitmore tells TMZ investigators are knee-deep in downloading and reviewing data from Oksana's computer.
Oksana's lawyers tried to block investigators from reviewing most of the data in her computer, but last month the judge said it was all fair game.
We're told one of the major downloads is almost complete, but there's still a lot of other data that must be retrieved and reviewed.
Whitmore says all the witnesses have been interviewed and when the data is reviewed it will be sent on to the L.A. County District Attorney, who will decide whether to prosecute Oksana for extortion. The D.A. will also decide whether to prosecute Mel Gibson for domestic violence.