A drug overdose killed ex-reality TV star and former Playboy playmate Anna Nicole Smith, Seminole tribal police Chief Charlie Tiger said today. Broward County Medical Examiner Joshua Perper said Smith was taking nine different kinds of medication in the days before her death, including a sleeping aid.

FORT LAUDERDALE, Florida (CNN) -- An accidental drug overdose killed former reality TV star and Playboy playmate Anna Nicole Smith, Seminole tribal police Chief Charlie Tiger said Monday.

Tiger said there was no evidence of foul play.

"We are convinced, based on extensive review of the evidence, that this case is an accidental overdose with no other criminal element present," Tiger said Monday.

The medical examiner's office had said on March 7 that the cause of Smith's death had been determined, but it would not be announced for one to two weeks to give police time to finish the investigation.

Broward County Medical Examiner Joshua Perper wanted to make sure none of the investigators' findings change any of his own findings, his office said then.

Perper said Monday that Smith was taking nine different kinds of medication in the days before her death, including a sleeping aid.

Tiger said Monday the case was now closed.

Smith, 39, was pronounced dead February 8 after being found unconscious in her hotel room at the Seminole Hard Rock Hotel & Casino near Hollywood, Florida.

A preliminary autopsy in February indicated that Smith did not appear to be a victim of foul play.

Smith was buried March 2 in the Bahamas after a court battle over who would have custody of her body and where she would be buried. She was buried next to her son, Daniel, 20, who died in September of what one pathologist said was a lethal combination of methadone and antidepressants.

Since her death, controversy has swirled over the identity of the father of Smith's infant daughter, Dannielynn. Smith's companion, Howard K. Stern, and two other men have claimed paternity.

In 1994, Smith married 89-year-old Texas oil magnate Howard Marshall II. He died the next year, and until her death, Smith was involved in a legal battle over the inheritance that included a 2006 U.S. Supreme Court ruling.