Paris Hilton's latest run-in with the law began when a motorcycle officer got a whiff of suspicious smoke emanating from a Cadillac on the Las Vegas Strip.
Suspecting the odor was marijuana, the officer stopped the car at 11:22 p.m. Friday and during a check police say a bag of cocaine fell out of the 29-year-old socialite's purse.
The officer "followed the vapor trail and the odor of marijuana to the Escalade," police Sgt. John Sheahan said.
It's the second time this year Hilton has been arrested on drug possession allegations, although authorities in South Africa dropped marijuana charges earlier this summer. In 2007, Hilton pleaded no contest to alcohol-related reckless driving and was sentenced to 45 days in jail.
This time, the hotel heiress was with her boyfriend, Las Vegas nightclub mogul Cy Waits, who manages a club inside the Wynn Las Vegas and was driving the black SUV.