Defense lawyers for Paul Manafort denied in court papers made public Tuesday that the onetime Trump campaign chairman lied to prosecutors about his contact with the Trump administration and a Ukrainian associate, broadly contesting special counsel Robert Mueller’s claim that Manafort violated his plea deal.

In the court filing, defense lawyers brushed aside the idea that Manafort intentionally lied to federal authorities during the course of his cooperation. But Tuesday’s filing—thanks to an error redacting portions of the text—also revealed several areas of interest to the special counsel’s probe into Russian interference in the 2016 U.S. election.