“There is a growing body of evidence that the lab is likely the most credible source of the virus,” Pottinger reportedly said, according to the Daily Mail.

The Trump appointee pushed the theory as the European Union made a new investment deal with China last week over protests from Pottinger and hesitance from the incoming Biden administration.

Pottinger, one of the first U.S. officials to raise alarms inside White House walls about the origins of the virus back in January 2020, has reportedly suspected since the early days of the outbreak that the coronavirus originated in a Chinese lab.

He ordered U.S. intelligence agencies to search for evidence that it had, the New York Times reported in April.