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Ms. Holmes, the founder of the failed blood testing start-up Theranos, blamed Ramesh Balwani, the former No. 2 at the company.

Prosecutors focused on her alleged deceptions, trying to make the case that she intentionally misled Theranos’s investors and commercial partners.

Behind the closed doors are whispers, gestures and a daily rhythm, plus two court artists, numbered tickets and some true-crime fans.

Erika Cheung, who raised issues about how the company conducted its blood tests, spent three days on the stand in the trial of Elizabeth Holmes.