David Cay Johnston. San Francisco (USA), 1948. He is an investigative journalist and winner of the 2001 Pulitzer Prize for Journalism, obtained for his investigation of loopholes in the US tax system, which led to reforms. Johnston revealed how large companies such as Colgate, Compaq or UPS had taken advantage of these holes to commit tax fraud. Upon his investigation, it was discovered that Merrill Lynch had helped Honeywell save $ 180 million. On that subject, taxes, he wrote for years for the Times. He has also been a contributor to Reuters and Al Jazeera, and currently writes for The Daily Beast. He worked for much of his career for the New York Times, has been chairman of Investigative Reporters and Editors (IRE), and is also the author of several New York Times best sellers, such as Perfectly Legal and Free Lunch. He has won the IRE Medal and the George Polk Award for his investigative reporting. He also teaches Journalism classes at Syracuse University College of Law. David Cay Johnston began to do the journalistic coverage of the figure of Donald Trump in the eighties, when he worked for the Philadelphia Inquirer newspaper, as a correspondent in Atlantic City. In his new book on Trump, he explores an issue rarely featured in the press: his ties to the mafia, drug dealers and criminals.