Anna Nicole Exchanges Vows With Lawyer

'Deeply In Love' Couple Pledge Their Commitment During Bahamas Ceremony

(CBS/AP)  "She wants to see exactly what happened in a final report because she wants to make sure it doesn't happen to someone else's son," he said.

Daniel Smith, who reportedly was hospitalized for depression and back pain before he traveled to Nassau, had been prescribed the antidepressant Lexapro, Wecht said. He said he had not determined whether Smith had also been prescribed Zoloft, the other antidepressant found in his system.

The two drugs can be lethal when taken together or in sequence, according to Ann Blake Tracy, the Des Moines, Iowa-based director of the International Coalition for Drug Awareness.

"The residue can stay there for some time, and if they're prescribed one after they've taken another, they can end up in trouble," she said.

Wecht said he did not know why Smith was taking methadone, a pain-reliever that is also used to ease heroin cravings for recovering addicts.

The combination of the three drugs, even in low doses, could easily have killed Smith, said Lisa Johnson, a pharmacist at Cedars-Sinai Medical Center in Los Angeles.

"The methadone will slow you down, but the other ones make your system speed up, so it's an odd combination," she said.

Chief Magistrate Roger Gomez said he has not received official toxicology results or a police report, which can determine whether a jury inquest is necessary. Wecht, a Pittsburgh-based forensic pathologist, plans to discuss his findings with Bahamas officials. Gomez said Wecht's toxicology results will not affect the Bahamian investigation.

Daniel Smith, who appeared several times on the E! reality series "The Anna Nicole Show," was the son of Anna Nicole and Bill Smith, who married in 1985 and divorced two years later.

Smith married Texas oil tycoon J. Howard Marshall II in 1994, when she was 26 and he was 89. He died the following year. She has since been involved in legal disputes over the estate.