Tonight on The Last Word: The New York Times reports that the Justice Department has secured an "insider witness" in the Trump classified documents case. Also, four Proud Boys members are convicted of seditious conspiracy in a January 6 trial. Plus, The Washington Post reports Kellyanne Conway's firm paid Ginni Thomas $80,000. And E. Jean Carroll's lawyers rest their case in the Trump civil rape trial. Bradley Moss, Andrew Weissmann, Glenn Kirschner, Rep. Daniel Goldman and Faith Gay join Lawrence O'Donnell.