LAS VEGAS (TMZ) - Paris Hilton will be charged with possession of a controlled substance -- .8 grams of cocaine -- which is a felony (watch arrest video).
Update, MON 3 PM: The Nevada District Attorney's Office filed the case Monday. According to the police report (view), obtained by TMZ, the cop who stopped the Escalade pulled along the passenger side of the vehicle and smelled "the strong odor of marijuana coming from the vehicle".
The cop then noticed the passenger was Paris Hilton. He observed Hilton trying to roll up the window. After the traffic stop and a crowd of 100 people gathered around, Hilton said she was "extremely embarrassed" and asked the cop if she could go to the bathroom at the Wynn Hotel.
At the hotel, Paris told the cop she needed lip balm, so the cop handed Paris her purse. "As she began to open it, I saw a small bindle of what I believed to be cocaine in a clear baggie begin to fall from the purse and into my hand," said the officer.
He also added, inside the purse was a "broken tablet of Albuterol" -- a prescription medication used to control wheezing. Cops also say they found Zig Zag wrappers commonly used to roll joints.
Paris then admitted the Albuterol was hers, but she said the cocaine was not and claimed the purse was not hers -- that she had borrowed it from a friend.
The cop questioned Paris about the cocaine, and, according to cops, Paris gave an odd answer. "She said she had not seen it, but, now, thought it was gum."
Note: Paris has changed her story with friends saying the purse was hers but had been in the possession of a friend.
Paris claimed to cops several cosmetic items in the purse were not hers, but she copped to $1,300 cash and some credit cards. Cops say they found .8 grams of coke in the purse.
Previously: Paris Hilton has hired one of the premiere lawyers in Las Vegas to defend her in her cocaine possession arrest TMZ has learned.
Hilton immediately snagged attorney David Chesnoff, a famous Vegas lawyer who has represented a slew of celebs including David Copperfield, Suge Knight and Vince Neil.
Chesnoff sprung Hilton from jail hours after her arrest. We're told Chesnoff is not going to waive the white flag by any means.
Sources, connected with the case tell us, it's significant Paris was released without posting any bail -- a sign that the amount of cocaine was small.
Although it's too early to tell, there might be an issue of 'whose cocaine was it anyway?'