Gery Shalon, the mastermind behind the 2014 JPMorgan hack, flipped after his 2015 arrest and became a key cooperator for the FBI. However, new evidence suggests that while working with the FBI in New York, Shalon may have built a massive new fraud empire in Europe. Reports indicate that Shalon, often referred to as the 'Don Corleone of cybercrime,' continued his criminal activities despite his cooperation. US law enforcement initially considered his cooperation a win. Read the Big Take for more details.