But you can understand why she might want to change her voice when up against the ingrained sexism that dictates that lower voices are more trustworthy and authoritative. You can understand why Thatcher was moved to visit a speaking coach, and why Holmes might have dropped her voice down, as low as she could, like some kind of vocal contortionist.

Today, The legal case against Holmes and her former boyfriend and COO at Theranos Sunny Balwani rages on. Both pleaded not guilty to nine counts of wire fraud, which carries with it the potential for a maximum of 20 years in prison.

In 2017, Holmes and Balwani spent three days being questioned by the SEC about Theranos’ failed technology and the claims that she made about it to investors, medical professionals and the media. Video of this deposition was broadcast on ABC News’ Nightline for the first time in January. You can see Holmes being interviewed, trademark turtleneck exchanged for a plain blue button down and a black blazer, blonde hair scraped back off her face.

And you can hear her too, answering probing questions from the SEC regarding the truth about her company and its blood-testing technology. “I don’t know,” Holmes said, her voice deep and low. “I don’t know.” In total, Holmes said “I don’t know” 600 times over the course of her deposition.

Did Elizabeth Holmes really fake her voice?