Spanish police have smashed the drug ring that is believed to have supplied Kenley teenager Jodie Nieman with the ecstasy tablet that probably killed her. Mark Adrian Whitley, 39 from Croydon, was among 13 suspected drug dealers arrested by police last Thursday in Ibiza where the 19-year-old died in July. Spanish police confirmed the majority of the pills seized in the raids were Pink Rock Star, the same type believed to have killed Miss Nieman. It is thought the dodgy pills were also responsible for poisoning eight other individuals in Ibiza over the summer. Police said the drug ring was the biggest British group operating on the island and had now been "completely dismantled". Officers from Spain’s Civil Guard, supported by British officers from the Serious Organised Crime Agency, raided eight properties across the party island. As part of Operation Rula, police confiscated £60,500 in various currencies, 4kg of cocaine, 3,600 MDMA pills, 53g of hashish and 300 doses of anabolic steroids. There were also precision scales, mobile phones and other drug-related paraphernalia in the addresses. A Civil Guard spokesman said: "This one of the most active gangs on the island which is the main supplier of cocaine and other designer drugs around the clubs and bars. "Enquiries were carried out on the basis of intelligence obtained by the Guardia Civil after other gangs involved in drugs trafficking on the island were dismantled. "The majority of these gangs were British and took advantage of the influx of young people during the summer. "The gang, which is now dismantled, only travelled to Ibiza in summer to meet the large demand for drugs on the island during this period. "When some of the drugs were running short, other gangs based in the UK would send new batches via different methods." Miss Nieman, a nail technician at Nails To Be Seen in Warlingham, was holidaying with friends when she fell unconscious at the Space nightclub in the Playa d'en Bossa resort on July 13. She died of a suspected heart attack, with friends admitting to Spanish police they had taken ecstasy. But Croydon Coroner’s Court has ordered a second investigation into the cause of Miss Nieman’s sudden death. Miss Nieman’s mother Debbie and her partner Simon Atkar, along with her brother Mark, recently visited the island to see where the teenager had died and to bring her body home. Her funeral was held on August 16 at Croydon Crematorium but her mother discovered Spanish police had removed the girl’s heart for tests. The family have been told it could be six months until results of the tests, which might give a conclusive cause of death, come back.