Centers for Disease Control and Prevention Director Robert Redfield instructed staff to delete an email from a Trump political appointee seeking control over the agency’s scientific reports on the pandemic, a senior CDC official told congressional investigators this week.

Redfield’s apparent instruction was revealed in a Monday closed-door interview with the House subcommittee probing the White House’s coronavirus response, which includes the Trump administration’s interference at the federal public health agency. It came following an Aug. 8 email sent by Paul Alexander, who was then the scientific adviser to Health and Human Services spokesperson Michael Caputo, aiming to water down the CDC’s famed Morbidity and Mortality Weekly Reports to match President Donald Trump’s efforts to downplay the virus.

“I was instructed to delete the email,” MMWR editor Charlotte Kent told investigators. Kent, who was on vacation when Alexander sent the email, said that she was informed of the request by a colleague who filled in for her, and that she understood the request to be from Redfield. Kent said that she never saw the email herself. “I went to look for it after I had been told to delete it, and it was already gone,” she told investigators on Monday.