Los Angeles prosecutors say Lindsay Lohan has left a rehab center her lawyer had reported she entered to serve a 90-day sentence for a car crash case and therefore violated her probation.
Also, a California state official says the treatment center, which is located in Newport Beach, does not possess a license to provide drug or alcohol addiction.
Lohan and her attorney have not commented and the actress' whereabouts are unknown. In March, she struck a plea deal in which she pleaded no contest to charges in a car crash case, including lying to police and reckless driving, in exchange for a sentence that would keep her out of jail -- as long as she complied with the law.
She was sentenced to 90 days in a treatment center for substance abuse, where she must remain for the entire time, or her probation could be revoked. Lohan is expected to spend her 27th birthday, which takes place on July 2, at the facility.
Her lawyer, Mark Heller, told a Los Angeles judge at a hearing on Thursday, May 2, that the actress checked into rehab that day -- a deadline set weeks ago. Santa Monica City Prosecutor Terry White told the Los Angeles Times he learned that Lohan spent just a few minutes in rehab and then left, adding: "Ms. Lohan is in violation of her probation, that much is clear."
Ultimately, it is up to a judge to decide if Lohan's probation should be revoked.
At Thursday's hearing, a prosecutor argued that the rehab facility she entered was not approved by a court. The judge set a May 10 deadline to investigate the place.
CNN quoted Deputy Director for the California Department of Alcohol and Drug Programs Millicent Tidwell as saying that the company that runs the treatment center does not possess a license to treat patients for substance abuse at its Newport Beach facility.
As part of her sentence, Lohan must also complete 18 months of counseling and 30 days of community labor and given a suspended sentence of 180 days in county jail, which means she would only have to serve that time if she is found to have violated her probation by not completing her sentence or by otherwise breaking any laws.
The actress has served five stints in jail in the past and has also undergone treatment for substance abuse at rehab facilities several times.