am confident at the end of the day we'll be tell a very full story to the american people about what happened. >> reporter: today the committee met with william walker, a top commander for d.c.'s national guard on january 6th. he's previously testified on january 5th he received a memo indicating he would need to seek approval from the secretary of army and defense before responding to any protests, something he described as unusual, but something that takes on new significance with the new details we're learning about the former chief of stap and his comments about the national guard. >> paula reid on capitol hill, thank you. let's get some more on all of this. joining us cnn special excess spon dent jamie gangel and cnn analyst jeffrey toobin, the author of "true crimes and misdemeanors: the investigation of donald trump." jamie, you're getting new insight tonight.