Texts Show Balwani Warned Holmes of Problems, Advised Fixes

As Elizabeth Holmes’s testimony enters its fourth day in her criminal-fraud trial, the focus is likely to shift to her former boyfriend and longtime deputy at Theranos, Ramesh “Sunny” Balwani. His name has been a constant presence at trial, invoked by both prosecutors and the defense as someone who had a hands-on role in management of the Theranos lab and close contact with its business partners.