According to The Telegraph, the body of the great-great-grandson of Prince Otto von Bismarck, Germany's Iron Chancellor, contained the highest level of cocaine ever seen by the pathologist conducting his post-mortem.
The Count, 44, was found alone in his near-empty Chelsea flat on July 2 by an estate agent who had been asked to check on him by his father, Prince Ferdinand von Bismarck.
His body was lying on a low mattress, his arm exposed and blackened. It is believed that he died two or possibly three days earlier.
Coroner Dr Paul Knapman, at Westminster Coroner's Court, today ruled that the Count died as a result of drug dependency.
The post-mortem found that he died of cardio-respiratory caused by his massive drug intake - very high levels of cocaine and morphine that could have come from heroin were found in his body.
The Count also had a damaged liver caused in part by years of abuse, and hepatitis B, hepatitis C and HIV infection.
Von Bismark led a glamourous but troubled life, which included being a homosexual, and throwing wild all-night parties at his five million pound flat off Sloane Square.
The last person to see the Count alive was his friend, Paul Hillstead, who described him as being very much on the edge.