George Papadopoulos, a former foreign-policy adviser to the Trump campaign, quietly pleaded guilty in early October to making false statements to the FBI in connection with special counsel Robert Mueller’s investigation into Russian meddling and possible collusion with the Trump team. The Chicago 30-year-old entered a guilty plea on Oct. 5. In a documents made public in federal court Monday, he acknowledged working with high-level Russian government representatives and offered to be a liaison to the Trump campaign, reportedly trying to set up meetings with Russian leaders, as has previously been reported. Specifically, in 2016, Papadopoulos said he met with a London professor who claimed to have damaging information about Hillary Clinton, including “thousands” of emails. The case was unsealed Monday. Former Trump campaign chairman Paul Manafort and his protégé, Rick Gates, were charged separately Monday. Papadopoulos is said to be cooperating with Mueller’s investigators.