(Reuters) — U.S. prosecutors on Wednesday added a new wire fraud charge to their criminal case accusing Trevor Milton, the founder and former chief executive of Nikola Corp., of defrauding investors by lying about the electric- and hydrogen-powered truck maker. 

The new charge concerns Mr. Milton’s alleged effort to defraud the seller of Wasatch Creeks Ranch in Utah by making false and misleading statements about Nikola's products and business prospects. 

Mr. Milton previously pleaded not guilty to two counts of securities fraud and one count of wire fraud over statements he made from November 2019 to September 2020. He faces a scheduled July 18 jury trial in Manhattan federal court. 

Lawyers for Mr. Milton did not immediately respond to requests for comment. 

The new fraud charge concerns Mr. Milton’s purchase of Wasatch Creeks Ranch from a Massachusetts man, who said he accepted Nikola stock options as part of the purchase price based on Mr. Milton's claims about the company. 

In a civil complaint filed on March 14 in Utah’s federal court, the seller said the options’ value was “destroyed” as Mr. Milton’s alleged lies became known and Nikola’s stock price cratered. The lawsuit seeks $45 million. 

Mr. Milton’s criminal case is among the most prominent involving a company that went public after merging with a special-purpose acquisition company, or SPAC. 

Critics say that process is prone to conflicts of interest and shoddy due diligence. 

Nikola went public in June 2020. Authorities have said Mr. Milton misled investors in social media posts, TV appearances and podcast interviews designed to drive up Nikola's stock price and bolster his stature as an entrepreneur. 

In December, Nikola agreed to pay $125 million to settle a related U.S. Securities and Exchange Commission civil fraud case.  

Nikola neither admitted nor denied the SEC’s accusations. The SEC has also charged Mr. Milton with civil fraud. 

On Monday, Mr. Milton, a former billionaire according to Forbes magazine, asked the judge in his criminal case not to let jurors hear evidence about his wealth, lifestyle and spending habits, saying it would be unfairly prejudicial.