Princess Beatrice’s ex-boyfriend Paolo Liuzzo’s cause of death has been revealed after he was found dead in a hotel room in February of this year. An autopsy report shows that the 41-year-old died after overdosing on a combination of drugs including fentanyl, cocaine, ketamine and the street drug bromazolam (a synthetic benzo). Liuzzo, who was just 23 when he dated the royal aged 17, was found dead in a Miami hotel room not far away from his listed address. Sources at the time said he had suffered from a drug problem and had racked up huge gambling debts. The report obtained by the Daily Mail …