Amy Winehouse allegedly bought £1,200 (nearly $2,000) worth of crack cocaine and heroine the night before she died, reports the Daily Mail.

According to the paper, a London drug fixer named Tony Azzopardi helped the late singer buy the narcotics in the early morning of July 23. She was found dead in her London home later that day.

Azzopardi, 56, was introduced to 27-year-old vocalist by her ex-husband Blake Fielder-Civil, and is coming forward because he claims he wants Winehouse's family to "know the truth about what happened."

However, no drug paraphernalia was found at the singer's house, and Winehouse's family says Azzopardi's story does not match up. Last week, family sources theorized that the troubled star died from complications from alcohol withdrawal after the singer quit drinking for three weeks.

"[Amy's father, Mitch,] said doctors had told Amy to gradually reduce her intake of alcohol and to avoid binging at all costs," the source said. "Amy told him she couldn’t do that. It was all or nothing and she gave up completely. Mitch said the shock of giving up, after everything she had been through over a bad few years, was just too much for her to take."

An autopsy was performed on Winehouse, but the results were inconclusive. Toxicology results will not be available for several weeks.

Watch the Amy Winehouse 'Rehab' Video