An inquest into the sudden death of Peaches Geldof in April has revealed the star had hidden a "capped syringe" in a box of sweets found beside her body.
The hearing at Gravesend Old Town Hall stated the socialite, writer and television presenter died of a heroin overdose, and that she was a heroin addict and had been taking the substitute drug methadone for two-and-a-half years before her death.
A toxicology report showed the 25-year-old had the drug in her system at the time of her death.
Detective Chief Inspector Paul Fotheringham, of the Kent and Essex Serious Crime Directorate, said Peaches was found dead in the spare room of her home in Wrotham, Kent, wearing a grey dress and a long-sleeved striped top.
Around Geldof, police found drug paraphernalia, including spoons, a cap from a syringe and resin from heroin.
In another bag, they discovered 6.9g of heroin of 61% purity, allegedly worth between £350 and £550, along with tights for a tourniquet, cotton wool, burnt spoons and citric acid.
Police believe the heroin was "prepared" elsewhere in the house before Peaches injected the lethal dose in a spare bedroom.
During the inquest, pathologist Peter Jerreat said puncture wounds were found on her body, along her wrists and thumbs. Evidence of methadone, morphine and codeine were also found in her blood.
He added that the methadone in her system had been synthesised from heroin and the levels of the drug in her body were in a "fatal range".
The police investigation into who supplied the drugs is ongoing and no arrests have yet been made.
At the hearing, Geldof's husband Tom Cohen said the last time he spoke to his wife was 5.40pm on Sunday and that he had no concerns for her wellbeing.
On Monday morning, he went to her house where he discovered her body.
It was revealed that Peaches had been having weekly drugs tests, which she told Cohen were clear, as part of an ongoing drug addiction treatment.
In February, Cohen found texts suggesting Peaches was taking drugs again and when he confronted her, she fetched heroin from the loft and flushed it down the toilet in front of him.