Former FBI lawyer Kevin Clinesmith will plead guilty to making a false statement in the first criminal case arising from U.S. Attorney John Durham’s review of the investigation into links between Russia and the 2016 Trump campaign.

Durham, the U.S. attorney in Connecticut was assigned by Attorney General William Barr more than a year ago to examine the origins of the Russia investigation.

Clinesmith was referred for potential prosecution after Justice Department Inspector General Michael Horowitz found he altered a key document in FISA filings related to Page. The FBI illegally surveilled Page because they suspected him of being an agent of Russia. Page was never charged with wrongdoing.

The inspector general found that Clinesmith altered an email about former Trump campaign adviser Carter Page to say that he was “not a source” for another government agency. Page has said he was a source for the CIA. The DOJ relied on that assertion as it submitted a third and final renewal application in 2017 to eavesdrop on Page under the Foreign Intelligence Surveillance Act.

“That is just the beginning, I would imagine, because what happened should never happen again,” Trump said Friday. “He is pleading guilty. It’s a terrible thing. The fact is, they spied on my campaign and they got caught. You will be hearing more.”