Police say Lindsay Lohan committed battery against former Betty Ford rehab center employee Dawn Holland during a December scuffle and add that a criminal investigation showed she violated the terms of her probation, which could send her back to jail.
The 24-year-old actress has served several stints behind bars stemming from a 2007 drunk driving and drug possession case conviction.
She has undergone about 90 days of court-mandated rehabilitation, given after she violated her probation by not attending required alcohol education classes. Lohan was set to leave the clinic Monday and E! News had reported that she was released. However, the actress will remain there for a few more days, the Los Angeles Times said.
Holland, who worked at the Betty Ford center as a technician, had accused Lohan of causing her to sprain her arm and hand by engaging in a violent confrontation with her on December 12 after allegedly refusing take a breathalyzer test.
Lohan's lawyer had said it was the actress who called authorities following the scuffle. The clinic then fired Holland after she spoke on camera to the press.
"The investigation determined Ms. Lohan violated several aspects of her probation, including the battery," the Palm Desert Police Department said in a press release.
Prosecutors are expected to review the results of the police investigation in the next few days to see if there is enough evidence to charge her with battery.
"The important, yet limited, investigatory role of the police to gather facts and collect evidence is well-established," she said. "The fact that the Palm Desert Police Department went outside this limited role to issue a press statement expressing its opinion about what should happen in Ms. Lohan's case is highly unusual and deeply troubling."
Lohan, known for her roles in "Freaky Friday" and "Mean Girls, pleaded guilty in 2007 to being under the influence of cocaine and no contest to driving with a blood-alcohol level above 0.08 percent and reckless driving.
Her next court date is on February 25, during which a judge is expected to rule whether or not her supervised probation could end. If is found to have violated its terms, she could be sent to jail for another stint - this time, lasting up to 180 days.
Lohan has completed a total of three stints behind bars - the first lasting 84 minutes, the second, 14 days. In September, she spent 15 hours in jail after she failed a drug test and wrote about it on her Twitter page. She entered a rehabilitation center days later. Lohan has undergone also treatment in rehab centers several times, including for unrelated incidents.