Jailed Wikileaks founder Julian Assange may be facing a slate of new criminal charges only days after the Central Intelligence Agency announced that it would not seek prosecution for his role in the Vault 7 leak in 2017.

Sources at Wikileaks have warned that the US Department of Justice is preparing new charges based on information provided by FBI informant Sigurdur Thordarson. A peripheral associate of the whistleblowing organization, Thordarson was arrested in his native Iceland in 2009 for his role in leaking information from that country’s banking system.

Thordarson began cooperating with the FBI in 2011, allegedly providing information for the Bureau’s investigations in to Wikileaks and hacktivist groups such as Anonymous. During hearings before the Icelandic Parliament, Interior Minister Ögmundur Jónasson described Thordarson as an FBI spy.

The publication by Wikileaks of the Vault 7 documents detailed the CIA’s capacity to compromise cars, web browsers, smartphones (including Apple’s iOS and Google’s Android), and most desktop operating systems.