New documents released by the U.S. Federal Trade Commission suggest that acting Attorney General Matthew Whitaker misled the agency’s investigators as he was stepping into his role last year as Justice Department chief of staff.

After several attempts to reach Whitaker about the Miami company where he was on the advisory board, the FTC investigator emailed his colleagues to relay that he finally reached Whitaker, who was willing to cooperate and asserted that he “never emailed or wrote to consumers” in his consulting role.

That statement to James Evans of the FTC appears to be inaccurate. Whitaker had written a letter in 2015 to a disgruntled customer who planned to report the company, World Patent Marketing, to the Better Business Bureau. In the letter, which was included in the FTC’s disclosure and reported previously by the news media, Whitaker threatened the customer, writing: “I am assuming you understand there could be serious civil and criminal consequences for you if that is in fact what you and your ‘group’ are doing.”