Meanwhile, Hilton's boyfriend Cy Waits was fired from his job after less than a week as top managing partner of the Tryst Nightclub at Wynn and XS The Nightclub at Encore.
Hilton was arrested Friday inside the Wynn resort after police say a small package of cocaine fell out of her purse. She has denied the cocaine and purse were hers.
Waits was arrested on suspicion of misdemeanor driving under the influence of alcohol or drugs. Charges have not yet been filed.
A police officer also reported finding a butt of a marijuana cigarette in the Cadillac Escalade in which the couple was stopped in front of the Wynn.
Waits was driving. According to the arresting officer, the 34-year-old failed two field sobriety tests.
Hilton is scheduled for arraignment Oct. 27 and would face probation if convicted.
The Associated Press contributed to this story.