JOHN CARREYROU is a two-time Pulitzer Prize–winning investigative reporter at the Wall Street Journal. For his extensive coverage of Theranos, Carreyrou was awarded the George Polk Award for Financial Reporting, the Gerald Loeb Award for Distinguished Business and Financial Journalism in the category of beat reporting, and the Barlett & Steele Silver Award for Investigative Business Journalism. Carreyrou lives in Brooklyn with his wife and three children.