elizabeth holmes was once the start up darling. her company promised to do away with painful sharp needle blood tests, replacing them with one simple pick of the finger. she had the look and the drive to become the youngest female billionaire, revered by entrepreneurs and politicians. she attracted big name investors. at one point henry kissinger, george schultz was on her board. there was just one problem. it was all a fraud. john brought down this house of cards. and his new book "bad blood" laying out his investigation into the scandal. he explained what first tipped him off and his pain taking pursuit of clues when he joined me this week from new york. >> welcome to the program. >> thank you for having me. >> so, look, we have announced your book "bad blood" is interesting. what got your attention? what made you delve into this story? >> well, i had covered health care at "the wall street journal" for the better part of ten years, and i read a profile of elizabeth holmes in the "new yorker" magazine in late 2014. she had rocket