Amy Winehouse had no illegal drugs in her system when she died, and it is still unclear what killed the singer.
The Winehouse family said in a statement on August 23 that toxicology results returned to them by the authorities "have confirmed that there were no illegal substances in Amy's system at the time of her death."
The statement said "alcohol was present," but that it has not yet been determined if alcohol contributed to her death.
The 27-year-old soul diva, who had struggled with drug and alcohol addiction for years, was found dead in her London home on July 23.
compiled from agency reports