LOS ANGELES - The fall of the blood-testing start-up Theranos and its founder Elizabeth Holmes - once the darling of Silicon Valley - goes under the microscope in a new film by Alex Gibney, a director known for his hard-hitting documentaries.

Speaking in Los Angeles earlier this year (2019), Gibney and two former Theranos employees who helped expose the company's lies say her charisma and investors' gullibility created a perfect storm - and a situation that endangered the lives of patients who trusted its supposedly revolutionary blood-testing technology.