Between May and June 2014, Kouider repeatedly complained to police that they were not taking her allegations seriously. The 21-year-old's remains were discovered in the fashion designer's garden last year Why did Sabrina Kouider and Ouissem Medouni kill 21-year-old Sophie Lionnet? Jurors heard how Sabrina Kouider was the ex-girlfriend of Boyzone founder member Mark Walton. Mark Walton was in Boyzone for about a year before he went on to have a successful career as a music mogul. When neighbours alerted fire fighters, Medouni tried to pass off the charred remains as a sheep. Tristan Kirk. BOYZONE founder and billionaire mogul Mark Walton today told how despite his turbulent relationship with Sabrina Kouider, he was "in love" with her, … Sabrina Kouider, 35, and Ouissem Medouni, 40, built a warped fantasy around music mogul and ex-Boyzone member Mark Walton and accused any Sophie Lionnet of spying for him Fashion designer Kouider, former partner of Mark Walton, founding member of Irish boyband Boyzone, sobbed and became incoherent when she appeared via video link at the Old Bailey alongside Medouni. A couple who tortured their French nanny before killing her and throwing her body on a bonfire have been sentenced to life in prison. The timid 21-year-old told officers the allegations were untrue. She claimed Mr Walton had been “using black magic to control her and there was nothing she could do about it”. On August 10, 2017, she took Miss Lionnet to Lavender Hill police station, claiming she had met Mr Walton, who had threatened to shoot the family. Twisted Sabrina Kouider and Ouissem Medouni imprisoned, tortured and killed Sophie Lionnet, 21, at their home near Wimbledon, South-West London. On April 28, Kouider was found “very agitated, kicking and screaming” outside her home in Wimbledon Park Road. Why did Sabrina Kouider and Ouissem Medouni kill 21-year-old Sophie Lionnet? Born in Algeria , Kouider grew up in Paris, where aged 18, she met Medouni, a fellow French Algerian five years her senior, at a fun fair. Sabrina Kouider waged a five-year war on a wealthy music mogul, reporting him to police more than 30 times with outlandish claims of black magic and sexual abuse of a cat. She had waged a five year war on Dublin-born Walton following their split, reporting him to police more than 30 times, with outlandish claims of black magic and sexual abuse of a cat, falsely accusing him on Facebook of being a paedophile, and claiming he had hired a helicopter to spy on her. By . Sabrina lived in Wimbledon, London. Kouider's obsession with Mark Walton, now a successful LA music producer, began after their two year relationship ended in 2013, as she blamed him for problems in her own life. Investigations failed to find a shred of evidence that the couple’s warped fears, but they refused to accept that Mr Walton and Miss Lionnet had never met. The balding 40-year-old, known as Sam, was weak and submissive. They tortured her by dunking her head under water into making an untrue “confession” which they filmed before killing her. Sabrina Kouider today told the court that Boyzone founder Mark Walton had been physically violent with her Kouider and Medouni are accused of killing and burning the body Miss Lionnet last September. He had “punched above his weight” in his love for her, according to the prosecution. Sabrina Kouider today told the court that Boyzone founder Mark Walton had been physically violent with her Kouider and Medouni are accused of killing … Medouni, a former banker, became an ardent believer of Kouider’s twisted reality, the jury heard. Sabrina Kouider, 36, and her partner Ouissem Medouni, 41, murdered 21-year-old Sophie Lionnet over a false belief she was having an affair with ex-Boyzone singer Mark Walton. See terms, A court has heard that Sophie Lionnet was beaten to death before being thrown on a bonfire, Sabrina Kouider after being taken into police custody, Major incident declared in London as hospitals face ‘critical’ threat, Woman shot during riots named as US Air Force vet and ‘great patriot’, London’s Covid crisis deepens as nearly 5k weekly cases in one borough, Pelosi speaks with military about stopping Trump launch nuclear strike, Dame Barbara Windsor’s celebrity friends attend star’s funeral. 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