LAS VEGAS — Paris Hilton had an explanation for police: The rolling papers, $1,300 in cash and several credit cards were hers, but not the purse they were in. And definitely not the bag of white powder that fell out of it. Believing it to be cocaine, an officer asked her who it belonged to. “She said she had not seen it but now thought it was gum,” Las Vegas police Lt. Dennis Flynn wrote in a report made public on Monday. Hilton told police the purse belonged to a friend. But the friend was never identified. The 29-year-old celebrity socialite was charged with cocaine possession. She was freed without bail before dawn Saturday after spending less than three hours handcuffed on a jailhouse booking room bench. Hilton’s lawyer, David Chesnoff, said he would not comment on the police report, and added, “the facts of the situation will be tested in a courtroom.” Flynn said Hilton acknowledged also owning a broken tablet of the prescription asthma medication Albuterol found in the purse she took with her into a security room at the Wynn Las Vegas resort. Flynn said Hilton had asked to be allowed to go into the hotel after her boyfriend, Las Vegas nightclub mogul Cy Waits, 34, failed field sobriety tests given by a motorcycle officer. Hilton is scheduled for arraignment before a Las Vegas judge Oct. 27 on a felony cocaine possession charge that could get her probation if convicted. A violation of that probation could be punishable by up to one to four years in Nevada state prison. Waits, 34, was arrested on a misdemeanor charge of driving under the influence of alcohol or drugs. He spent the night in jail before he was released on $2,000 bail with a Nov. 29 court date.