this past spring -- >> i always liked michael, and he's a good person. >> the man is an honest, honorable lawyer. >> reporter: so what changed? michael colen. >> this man has turned a corner in his life, has hit a reset button, and he's now dedicated to telling the truth. >> reporter: no longer dedicated to being donald trump's mini me as he was when he started working for the boss more than a decade ago. >> michael was, i always liked to say, the radon van of the office. >> i'll take care of it. >> he took care what have had to be taken care of i don't know what had to be taken care of, but all i know is michael was taking care of it. >> he's the guy you could call at 3:00 in the morning. >> reporter: do you know stories of donald trump calling him at 3:00 in the morning? >> donald trump has called him at all hours of the night. >> reporter: he's not calling now because cohen is singing, admitting negotiations about trump tower moscow continued during the presidential campaign while trump denied having any business interests in russia and