A meeting last year where Associated Press reporters discussed with federal officials the news outlet’s investigation of former Trump campaign chairman Paul Manafort’s finances may have led the FBI to a storage locker the bureau raided, an FBI agent testified Friday.

The unexpected testimony from FBI Agent Jeff Pfeiffer at a federal court hearing in Alexandria, Virginia, on the legality of the May 2017 search was the first live witness the government has offered against Manafort since special counsel Robert Mueller’s first indictment against the longtime lobbyist and political consultant was returned last October.