Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Lady Beth Douglas died following a two-day drug and alcohol binge Mr Karagoli said they had spent at least two days drinking and taking drugs while staying in hotels.He briefly left the party to buy a bottle of red wine and said that when he returned, Lady Beth was apparently asleep on a sofa. He said he fell asleep alongside her but when he awoke, she was unresponsive and he called an ambulance.”I couldn’t wake her up,” he said. “The man in the flat said she had taken heroin. I just picked up her arms and saw a little peck of dots.”Lord Queensberry criticised police for showing little interest in identifying the dealer, who had also possibly helped his daughter inject the drug. Lord Queensberry has been married three times and had eight children. Lady Beth was the only daughter of his most recent marriage to Taiwanese artist Hsueh-Chun Liao.Caroline Carey, the half sister of his eldest son, Ambrose Carey, married Salem Bin Laden, older brother of Osama, when she was an art student. She was pregnant with their first child when he was killed in an air crash in 1988 and later married his younger brother Khaled. An inquest last week heard that she had died after attending a house party at a £2.5million flat in Notting Hill, west London, in March. The boyfriend of an aristocrat’s daughter who died after a two-day drug and alcohol binge has admitted he was too high on drugs himself to save her.Jenan Karagoli, 21, has described how he tried to resuscitate 18-year-old Lady Beth Douglas, the youngest daughter of the Marquess of Queensberry, after finding her unconscious at a house party with needle marks in her arm.He had been dating the talented young violinist for ten months and was confronted by her grieving father David Douglas, the 88-year-old 12th marquess, days after her funeral.Mr Karagoli told the Mail on Sunday: “He told me that I could have looked after her better. There was a heavy sense of I could have done something.“I fully believe I could have done more, but unfortunately at the time I was too gone.”Lady Beth, who was known to friends and family as Ling Ling, had a history of drug abuse and self harm and was being treated for a range of mental health problems. She was sectioned for six months when she was 17. Lady Beth Douglas died following a two-day drug and alcohol binge The inquest recorded Lady Beth’s cause of death as a cardiac respiratory failure and cocaine and heroin poisoning. She was cremated in a Buddhist ceremony in London.Her death was the latest tragedy to befall the aristocratic family, which has a colourful history and has endured such misfortune over the centuries it has been labelled the “Queensberry curse”.Most recently, Lord Queensberry’s third son, Lord Milo Douglas, who suffered with depression, died in 2009 aged just 34 after jumping from a block of flats.