HOLLYWOOD, Fla. -- More tests will be needed to determine the cause of Anna Nicole Smith's death, but there was no evidence of trauma, illegal drugs, or pills or tablets in the model's stomach, said Dr. Joshua Perper, the chief medical examiner for Broward County.

Prescription drugs were found in Smith's hotel room at the Seminole Hard Rock Hotel and Casino, said Perper.

Late Thursday, sheriff's deputies carried out at least eight brown paper bags sealed with red evidence tape from the sixth-floor hotel room where Smith collapsed.

Charlie Tiger of the Seminole Police Department said Smith was a frequent visitor to the hotel and casino. She had checked into the hotel Monday evening and was scheduled to check out Friday.

The events of the afternoon leading up to Smith's death, according to Tiger, were that a private nurse employed by Smith placed a call to the hotel operator and the operator called 911 at 1:38 p.m.

Smith's bodyguard was not in the room at the time of the star's collapse, but apparently came into the sixth-floor hotel room and performed CPR at 1:45 p.m. When paramedics arrived, she was unresponsive and she was rushed to nearby Memorial Regional Hospital just after 2 p.m.

She was pronounced dead at the hospital.

On Friday, Tiger issued this statement:

"We have investigated thoroughly. At this point no evidence has been revealed to suggest that a crime occurred. We found no illegal drugs, only prescription medicine. We are not releasing the names on those prescriptions. We have taken sworn statements from all the parties involved; everyone has cooperated fully. We are continuing to reveal surveillance tape, but nothing unusual has been observed," he said.

"This incident will remain open. And open investigation until all tests are completed by the medical examiner's office," said Tiger.

If Smith died of natural causes, the findings will likely be announced quickly, but definitive results could take weeks, said Dr. Joshua Perper, who was performing the autopsy.

Mother Blames Drugs For Death

The mother of former Playboy playmate and model Anna Nicole Smith blamed drugs Friday for her daughter's sudden death that ended an extraordinary tabloid life at just 39.

"I think she had too many drugs, just like Danny (Smith's late son)," her mother, Vergie Arthur, told ABC's "Good Morning America." "I tried to warn her about drugs and the people she hung around with. She didn't listen. She was too drugged up."

Smith's attorney, Ron Rale, said the one-time reality TV star had been ill for several days with a fever and was still depressed over the death five months earlier of her 20-year-old son from what a private medical examiner determined was a combination of methadone and two antidepressants.