Ex-Theranos CEO Elizabeth Holmes says 'I don't know' 600+ times in depo tapes: Nightl

In never-before-broadcasted depositions, attorneys for the Securities and Exchange Commission ask Holmes questions about whether she helped orchestrate an "elaborate, years-long fraud."

WATCH THE FULL EPISODE OF NIGHTLINE: https://bit.ly/2RR3UPK

'Nightline' documentary, podcast: 'The Dropout,' the story of Elizabeth Holmes, Theranos --- https://abcn.ws/2SYNUY7