Alexandria, Virginia (CNN)A court hearing on Friday revealed that US authorities have previously unknown information about former national security adviser Michael Flynn doing secret work for the Turkish government "because of (his) relationship with an ongoing presidential campaign."Michael Flynn blames prosecutors, and argues he helped them enough to avoid jail After Flynn's guilty plea in late 2017, prosecutors charged his Flynn Intel Group partner, Bijan Kian, with illegally lobbying for Turkey. Kian's trial is about to start on Monday. Kian's defense team received the statement Friday morning from prosecutors in the Eastern District of Virginia as part of the pre-trial preparations. This comes as Flynn's cooperation deal with prosecutors is in jeopardy, after they accused him of trying to change his story from what he pleaded to, and dropped him as a government witness at the Kian trial.