Simone Joyner / Getty Images Singer Amy Winehouse onstage at Koko in the London district of Camden Town on Nov. 14, 2006

A spokesman for Amy Winehouse’s family revealed on Tuesday that a toxicology report shows there were no illegal drugs in the singer’s system at the time of her death.

The 27-year-old soul singer had publicly battled with drug and alcohol addiction throughout her career, and many were quick to say that her death on July 23 had seemed like a foregone conclusion. However, the initial autopsy of Winehouse’s body didn’t shed any light on the specific cause of death.

While Tuesday’s announcement complicates the many quick-hit theories on what killed Winehouse, there’s still a real possibility that her addiction had a direct hand in her death. The toxicology report did find that “alcohol was present” in her system, though the family spokesman said it was unclear if that contributed to Winehouse’s death.

Megan Gibson is a reporter at TIME. Find her on Twitter at @MeganJGibson. You can also continue the discussion on TIME’s Facebook page and on Twitter at @TIME.

PHOTOS: The Life and Times of Amy Winehouse