Paris Hilton's boyfriend is facing criminal charges stemming from his arrest with the celebrity socialite on the Las Vegas Strip last summer.
A complaint filed on Thursday charges 35-year-old Cy Waits with being under the influence of marijuana and driving under the influence and possession of marijuana.
The former nightclub mogul could face up to four years in prison.
Police said an officer stopped the sports utility vehicle that Waits was driving on August 27 after smelling marijuana smoke coming from the vehicle.
He is due for arraignment on February 17.
Paris is serving a year of probation after pleading guilty to cocaine possession and obstruction charges over the same incident.