The U.S. government formally filed charges in July against Trevor Milton, the founder and former CEO of Nikola (NASDAQ: NKLA), and investors fled the stock as a result. Shares of Nikola lost 34.3% in July, according to data provided by S&P Global Market Intelligence, as investors fret about what the future holds for the once-promising electric truck start-up. The charges filed against Milton were no surprise for investors familiar with the Nikola story.