'I thought the cocaine was gum,' claims Paris Hilton as she is charged with drug possession and faces FOUR years in priso

Paris Hilton is claiming she believed the cocaine found in her purse was chewing gum.

According to police report released today, the 29-year-old was handed her purse by an officer when a small bag containing the drug fell out.

The officer reported that Hilton said she had not seen the bag 'but now thought it was gum.'

Hilton was arrested for possessing cocaine in the early hours of Saturday morning after her car was stopped by police in Las Vegas.

She has been charged with felony possession of a controlled substance, 0.8 grams of cocaine, it is claimed today.

The socialite could face four years in prison if convicted.

She is denying the allegations, claiming the cocaine which was allegedly found, along with the purse, was not hers.

She said she had borrowed the purse from a friend.

And somehow, according to Hilton, the contents of the purse were split between herself and the friend.

The report states she claimed ownership of a broken Albuterol pill - a prescription drug used to help people with breathing - Zig Zag wrappers commonly used to smoke marijuana, $1,300 in cash and credit cards.

However, 'She said several cosmetic items inside the purse were not hers,' according to the police report.

Police report: The Las Vegas arrest report has been released showing Hilton was pulled over at the Wynn Hotel

The District Attorney filed the case today, with an October 27 arraignment, according to website TMZ.

Nevada law states that if convicted, Hilton could get anywhere from probation to four years in prison - but the standard sentence is one to four years.

She could also get fined up to $5,000.

Her boyfriend Cy Waits, who was driving the car, was booked on charges of DUI.

Today, he is said to have lost his job as head of nightclub operations for Wynn and Encore properties after this weekend's events.

According to the police report, Hilton was pulled over after a policeman smelled 'the strong odour of marijuana coming from the vehicle.'

The officer then noticed the passenger was Hilton who he then observed trying to roll up the window.

The heiress was forced to step out of her luxury car as the below photograph shows.

Moment of truth: Heiress Paris Hilton is pulled over by Las Vegas police officers