03/29/2007 at 05:00 PM EDT
Paris Hilton has been found in violation of the terms of her probation and faces a maximum sentence of 90 days in jail, the Los Angeles City Attorney's Office announced Thursday.
Hilton, 26, was spotted Feb. 27 speeding down Sunset Boulevard
around 11 p.m. without her headlights on, says L.A. Sheriff's spokesman Oscar Butao.
After pulling over her 2007 Bentley Continental GTC Convertible, officers found Hilton was driving with a suspended license – the result of her DUI arrest last September.
In that case, she pleaded no contest
to a lesser charge of alcohol-related reckless driving on Jan. 22, and was placed on 36 months probation.
Hilton's rep and attorney were not immediately available for comment.
Previously, Hilton's spokesman Elliot Mintz told the Associated Press that she was unaware that her license had been suspended.
"When Paris called me [after she was pulled over], she asked if her license was suspended," Mintz said. "If that's the case, she and I are unaware of it."
But Nick Velasquez, spokesman for the City Attorney's Office, said Thursday: "We have sufficient evidence to prove that Hilton had knowledge of the suspension, and yet continued to drive."
A hearing was set for April 17.