A former FBI lawyer pleaded guilty Wednesday to falsifying a document investigators relied on to renew court-authorized surveillance of former Trump campaign adviser Carter Page, in the first prosecution to stem from U.S. attorney John Durham’s inquiry into the origins of the Russia investigation.

Kevin Clinesmith, 38, appeared at a virtual hearing convened by U.S. District Judge James Boasberg of the District of Columbia, a week after prosecutors accused him of doctoring an email in 2017 to indicate that Page was “not a source” for the CIA, when in fact he had provided information to the spy agency in the past.