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Charlie Sheen's wife Brooke Mueller - who entered rehab at The Canyon in Malibu Feb. 9 for an addiction to crack - has left the facility, reports.

According to the site, someone from the staff had sent her admissions document to various media outlets.

The facility, which acknowledges the privacy breach, is currently conducting an internal investigation.

Her rep tells Extra, "Brooke voluntarily chose to leave The Canyon for purposes of privacy, and immediately checked into an undisclosed facility to diligently continue her treatment. Her commitment to recovery and being the best mother she can be remains the most important issue."

"Brooke is a serious drug addict," an insider tells of the mother of twins, who was involved in a Dec. 25 domestic dispute in Aspen, Colo., with Sheen, 44.

Meanwhile, the LA County Department of Children and Family Services visited the family's home Sunday to check on the couple's twins, Max and Bob, who turn 1 March 14. "It was routine and procedural," his rep tells Us. "It had been scheduled."