California’s attorney general Edmund Brown said on Thursday night that Smith’s boyfriend and attorney Howard K Stern and the two doctors — Khristine Eroshevich and Sandeep Kapoor — conspired to “repeatedly and excessively” provide Smith with drugs.
Smith, 39, was found dead in February 2007 in a Florida hotel room. Her death was ruled an accidental drug overdose.
“These individuals repeatedly and excessively furnished thousands of prescription pills to Anna Nicole Smith, often for no legitimate medical purpose,” Brown said.
“There is ample evidence that ... Eroshevich and Doctor Kapoor violated their ethical obligations as physicians, while Mr Stern funnelled highly addictive drugs to Ms Smith,” Brown said.
Over a period of three years, the suspects “furnished thousands of prescription pills to Ms Smith, including opiates, benzodiazapines, and other controlled and non-controlled substances,” he added.
The doctors “falsified prescriptions and prescribed unwarranted amounts and combinations of highly addictive medications,” while Stern “served as a vital link in obtaining, delivering, and administering these prescription drugs” to Smith.
An autopsy found that Smith’s death was due to a cocktail of anti-anxiety medication, methadone, antibiotics and other prescription drugs.
It came shortly after her son Daniel, 20, died from an overdose in the Bahamas in September 2006.
Born Vickie Lynn Marshall, Smith married Texas oil tycoon Howard Marshall in 1994, who she met while working at a strip club. She was 26 at the time and he was 89.
Marshall died in 1995. His son Pierce Marshall contested Smith’s claim to the billionaire’s inheritance in a case that reached the US Supreme Court.
The wealth is still tied up in litigation, even though both Pierce Marshall and Smith have died.
Smith’s young daughter Dannielynn, born in September 2007, stands to gain once the case is resolved. Her father is photographer Larry Birkhead.