The identity of the drug dealer who sold Peaches Geldof the heroin that killed her may never be known as police announced they had ended their investigation.
Detectives said they had "exhausted all lines of enquiry" 15 months after the 25-year-old was found dead at her Kent home.
The model and TV presenter was discovered slumped on a bed in a spare room by her husband Tom Cohen last April.
An inquest into her death found the mother-of-two died from a fatal overdose of the class A drug.
Police found 6.9g of "importation quality" heroin stashed in a cupboard with a purity of 61% - far more than the 26% commonly found at street level.
Also discovered was a syringe containing heroin residue and other drugs paraphernalia including burnt spoons, syringes and knotted tights throughout the property.
Shortly before her death she had posted a picture of her and her mother Paula Yates, who also died from a heroin overdose in 2000, on Instagram.
Pathologist Peter Jerreat said evidence of injections had been found on Ms Geldof's body during a post-mortem examination but he did not believe she had intended to kill herself.
In the two years before her death Peaches, who was mum to sons Astala and Phaedra, had been taking the heroin substitute methadone.
"You're the father who is responsible and clearly failed. You go back, you go over. What could you have done? You do as much as you can."