but that was legally sanctioned by the courts. so it's not clear what mr. trump was alluding to. meanwhile, we're getting fresh insights into the mueller probe and one key witness who gave the special counsel a lot of insider knowledge early in the investigation. we get the latest from cnn's pamela brown. >> reporter: well, president trump is responding to these latest revelations unsealed in court documents that michael flynn cooperated with mueller's investigators in the obstruction probe and the president is making the false claim that he was never warned about flynn before bringing him on as his national security adviser. mr. trump on a twitter tirade, complaining again about the origins of the russia investigation. and repeating unfounded claims his campaign was spied on, tweeting "treason means long jail sentences and this was treason." before taking issue with new details surrounding his former national security adviser michael flynn, saying "it now seems general flynn was under