Nikola Corp. founder and chairperson Trevor Milton has not only left his electric truck company - he has also gotten rid of his Twitter account.

The former head of the Tesla rival appears to have lost interest in his social media account days after he stepped down from Nikola's board in the wake of federal investigation about accusations of deceit.

A search for his Twitter account, which as of early Monday had more than 100,000 followers, resulted in a Twitter message that said it no longer exists.

An enthusiastic fan of social media, the former Nikola head honcho has been under pressure since short-selling investment company Hindenburg Research claimed his company gave a false account of its engineering and vehicle prototypes.

Milton often turned to Twitter to fire back at his detractors and make disclosures on Nikola's vehicle models. In his resignation letter, he said the company is "truly in my blood and always will be," adding that the focus should be on the Phoenix-based startup and not him, stock-market news service Benzinga quoted the letter.

Nikola said Milton would be replaced by Stephen Girsky, a former executive at General Motors who is already a member of the company's board. In a statement posted on his Twitter account Monday, Milton said he planned to defend himself against "false accusations by outside detractors," The Wall Street Journal reported.

The accusations came two days after Nikola announced a contract to have General Motors manufacture its all-electric pickup, the Badger.

Milton's unexpected abandonment of his Twitter account came the same day that documents revealed he secured $2.5 billion in Nikola shares as part of his severance deal. His representatives were unavailable for immediate comment.

The 38-year-old billionaire - who describes himself as a serial entrepreneur - founded Nikola in 2015 and has an almost one-quarter stake in the company, data by FactSet showed.