In 1975, concerns were raised that Argent executive Frank Rosenthal was involved in the company's casino operations, despite not being licensed. In May 1976, the Nevada Gaming Control Board launched an investigation into a slot cheating operation at the Stardust, possibly dating back to 1968. Dozens of former and current employees were questioned as the board sought to determine their involvement in the operation. The investigation soon widened to look at Argent's other casino properties, leading to the discovery of a skimming operation at the resorts. It was among the city's biggest skimming scandals. Jay Vandermark, the Stardust's slot machine boss, oversaw the skimming. He disappeared once the operation was uncovered, and he was later presumed dead. Rosenthal was never charged in connection with the skimming.