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 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."

Hilton and her boyfriend were stopped in a black Cadillac Escalade after the officer smelled a "vapor trail" of marijuana smoke.