Amy Winehouse's toxicology reports have come out.

The report, which was issued Tuesday, suggests that there were no illegal drugs found in her system. Her father, former cabbie Mitch, 60, told a friend, "This has been one long nightmare - and it's still not over. We just need to know what killed our little girl. But we're one step further to the truth now, which is a small comfort."

Apparently, shortly after her death, a London drug fixer claimed he helped Winehouse buy £1,200 of crack cocaine and heroin the night before she died.

With the toxicology report confirming no illegal drugs in her system, the role of alcohol in the death cannot be ruled out. The Winehouse family said the toxicology results indicated she had been drinking alcohol.

A spokesperson for the family declared: "Results indicate that alcohol was present, but it cannot be determined as yet if it played a role in her death." At Amy's funeral, Mitch told mourners his daughter had been the happiest she had been in a long time in the weeks before her death and had completed "three weeks of abstinence."

He said that she had conquered her drug addiction and was "trying hard to deal with her drinking." "A theory is that her body couldn't cope with the quick withdrawal," said another source close to the family.

But the family suspect that a period of not drinking followed by boozing in the week of her death might have killed her.

Winehouse was discovered dead in her £2 million home by her security guard just before 4 p.m. on July 23.

The previous evening, she had been examined by her doctor, who had given her the all-clear.

The family awaits the outcome of the inquest in October.