SAN JOSE, Calif.—A key witness in a trial that led to the conviction of disgraced Theranos CEO Elizabeth Holmes adamantly stood by his testimony during an unusual court appearance Monday. The prosecution witness, former Theranos lab director Adam Rosendorff, made a remorseful appearance at Holmes’s Silicon Valley home after the trial, raising questions about potential misconduct.
The 75-minute hearing opened the same day that Holmes, 38, had been scheduled for sentencing following her conviction on four felony counts of investor fraud earlier this year. She is facing up to 20 years in prison for lying to Thrernos investors about a blood-testing technology that she promised would revolutionize health care, but that never worked the way she had boasted….