> In September 2020, two days after Nikola established ties with General Motors, short seller Hindenburg Research released a report accusing Milton of making false statements and characterizing Nikola Motor Company as "an intricate fraud" over many years.[4] Nikola stock fell by 8 percent that day, and fell an additional 15 percent the following day after Milton failed to deliver his rebuttal as he previously promised on Twitter.[8][9][10] Further verification by Bloomberg and Financial Times confirmed some of the details presented in the report.[11][12] As of September 12, 2020, Nikola Motor Company was being investigated with regard to a shareholder lawsuit by at least one law firm for possible fraud as detailed in the report from short seller Hindenberg (most of which referred to statements and actions by Milton). [13] On September 14, Bloomberg, the Financial Times, and the Wall Street Journal all reported that the US Department of Justice joined the SEC in the investigation related to potential securities fraud.