When did Chicago Planning and Development Commissioner David Reifman Learn that FBI mole Danny Solis was committing federal crimes?

When did Planning and Development Commissioner David Reifman learn that FBI mole Danny Solis was committing federal crimes? What did David know about the "Double Door" situation at the City Hall meeting? David Reifman recently retired. Other recent early retirements include Luis Gutierrez, Danny Solis, and Rahm Emanuel.