It was a good news/ bad news scenario for Paris Hilton after the globe-trotting heiress was arrested for cocaine possession in Las Vegas over the weekend. The bad news, obviously, was that police allege they found cocaine in Hilton's purse after pulling over boyfriend Cy Waits' black Cadillac Escalade outside the Wynn Las Vegas resort on Friday night because they suspected that marijuana was being smoked inside the vehicle.

But Radar Online is reporting that Hilton — who claimed the purse in which a small amount of cocaine was found did not belong to her — may be able to beat the charges because she was not searched on the scene, according to an unnamed source close to Hilton. The source said that Paris was taken into the security offices at the Wynn and searched there.

"Cops discovered the cocaine inside the security offices where Paris was taken," the source said. "Because Paris was taken away from the scene where the car was pulled over, this could potentially be an illegal search of a person ... Las Vegas Metro didn't follow standard procedures when Paris was arrested and her lawyer will be talking to the D.A. about this."

Hilton has said the purse belonged to a friend, though police have not identified any other passengers in the vehicle so far or pressed charges against anyone besides the reality star and Waits, who was charged with driving under the influence of drugs and/or alcohol. Hilton's Las Vegas-based attorney, David Chesnoff, was slated to speak to the Las Vegas District Attorney's office on Monday to argue that there is no basis for the charges, since, the source said, the amount of cocaine police allegedly found is "negligible, the purse it was found in wasn't hers and Paris was illegally searched."

The news was not as good for nightclub boss Waits, who was reportedly fired by boss Steve Wynn following the arrest. According to the Las Vegas Review, the couple were arrested shortly after leaving the Wynn resort, where Waits and twin brother Jesse were promoted to nightclub operations chiefs late last week. The paper could not reach Waits and Wynn for comment to confirm the reports.

KSNV-TV reported that earlier Friday night Hilton declined an offer to keep her limo for the night and instead said Waits would be driving her party around for the evening.

Hilton thanked her fans for standing by her in her latest drug arrest, tweeting on Sunday, "I'm so thankful to all my fans for all the love and support you are giving me. Thank you all. Love you so much. Love Paris xoxo."

The heiress had another run-in with the law over alleged drug possession earlier this summer when she was detained in South Africa at the World Cup for marijuana possession. But the case against Hilton was later dropped after officials learned that someone else in her group was smoking. Hilton has a history of getting in trouble for possessing substances and hitting the road, including a 23-day jail sentence in 2007 for violating probation stemming from a 2006 DUI bust.