"This is the only piece of Anna I have left," Stern (reunited with Dannielynn on Feb. 10) told ET. Photo by: CANAAN RUBIN / ENTERTAINMENT TONIGHT / SPLASH NEWS
The Mysteries She Left Behind| Anna Nicole Smith, Howard K. Stern
Smith's long-estranged mother, Virgie Arthur, 55, concluded on Good Morning America, "She had too many drugs." Arthur joins a growing list of Smith relatives and friends, including onetime friend Jackie Hatten, who blame drug abuse for her death. "She always said she would O.D. like Marilyn Monroe, but I don't think she really wanted to," says Hatten. Smith's ex-boyfriend Larry Birkhead has claimed to have seen her take drugs while she was pregnant. Although Smith's personal physician Dr. Sandeep Kapoor concedes "it was obvious that she had substance abuse issues," he also notes that "she knew the baby was her biggest priority." He says that she took no dangerous prescription drugs during her pregnancy.

Stern himself has been accused of enabling Smith's drug habit. Stern's camp vigorously disputes all such accusations. "He was in love with her, why would he kill her?" says Bonnie Stern. "My brother never fed her a drug in her life. Never! Howard couldn't control the situation. It was up to Anna. When someone wants to do something, you can't stop them."

Stern has his own theory on what killed Smith. His sister says he blames all of the compounding stresses in her life – Daniel's death and the upcoming inquest, Birkhead's paternity suit, the dispute over ownership of her home in the Bahamas. "Howard thinks she just finally gave up the will to live. Her body just couldn't take it anymore," says Bonnie. "The heartbreak of Daniel's death was devastating. She was having nightmares about Daniel." In her final interview, filmed this month with Entertainment Tonight, a distraught Smith said she feared that Daniel was trapped in purgatory.