Elizabeth Holmes, the founder of blood testing start-up, Theranos, that once seemed to promise the impossible - has been found guilty of four charges of fraud. The charismatic young executive had been hailed as a visionary who would revolutionise health care, gaining almost a-billion dollars from high-profile investors. It's a stunning downfall of the former tech darling, who now faces up to 20 years in prison.

Scott Lucas is a professor of international politics at the University of Birmingham in the UK. He explains why the Elizabeth Holmes trial was so captivating to the public.

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