The hotel heiress and star of the reality TV show "The Simple Life" was sentenced to three years probation in January after pleading no contest -- the equivalent of a guilty plea -- to alcohol-related reckless driving.
Five weeks later, police pulled Hilton over again in the city of West Hollywood for driving without headlights and impounded her car, a $190,000 Bentley, when they discovered her license had been suspended, authorities said.
The case was then referred to the City Attorney's Office.
At the time, Hilton's spokesman, Elliot Mintz, said his client was not aware that her driving privileges had been curtailed. But prosecutors have since concluded otherwise.
"We are confident that we have sufficient evidence to prove that her license was suspended, and that she had knowledge of that suspension," Velasquez said.
If found to have breached the terms of her probation, Hilton could be sentenced to up to 90 days in jail, he added.