Winehouse had only Librium in system at death

The 27-year-old soul singer scored hits with such songs as "Rehab" and "Back to Black," which was the title track of her smash hit 2006 album. But even as Winehouse rose to stardom, she battled drug and alcohol addiction.

When she died on July 23, it was widely assumed that substance abuse was the root cause. Toxicology results from an autopsy released by the family late last month showed no illegal substances and some alcohol, although how it contributed to her death was not made clear.

Mitch Winehouse told Cooper that the only drug in her system was a small amount of Librium, which is used to help people overcome alcohol detoxification.

via ca.news.yahoo.com