What Caused Anna Nicole's Sudden Death?

Only “Extra” has the last video of Anna Nicole Smith in the very same hotel where she died. Her sad words slurred just after watching a boxing match.

But the question remains: how did Anna Nicole die?

“Extra” was with investigators Thursday night as they carried away eight bags of evidence from the hotel room.

Us Weekly reported Friday that the former model died of a drug overdose. Star magazine claims dugs, including Vicadin, which are commonly used for patients recovering from plastic surgery, were taken from Anna Nicole's room.

Anna Nicole's former chauffeur Todd Bernstein told “Extra” that the starlet may have had some work done after giving birth five months ago.

“I believe she was in Florida for a possible breast augmentation reconstruction,” he said.

Today, conspiracy theories are exploding around the world, raising the question: was it murder?

That is the sensational headline splashed across the New York Post today. “Extra” has learned that six people were staying in Anna's suite, and while police are reviewing hotel surveillance tapes, nobody is under suspicion.

So was is suicide? In a 1998 interview with “Extra,” Anna laughed off an earlier rumor that she once tried to take her life like her idol, Marilyn Monroe.

“If I was gonna kill myself like Marilyn Monroe, I would have did it in her home,” she joked. “I mean, c'mon.”

So are drugs to blame for Anna Nicole's death? Smith's estranged mother, Virgie Arthur, tearfully told “Good Morning America” that she thinks so.

“I think she had too many drugs,” Arthur said. “Just like Danny. And I tried to warn her about drugs and the people she hung around. And she didn't listen.”

Cyril Wecht, who performed the autopsy on Anna Nicole's son Daniel, told “Extra,” “Anytime you have a sudden death, then you've got to think of the possibility of drugs.”