Tue, 04/25/2023 - 10:56 Tech Insider Former Theranos president and COO Ramesh "Sunny Balwani" self-surrendered to prison on Thursday to begin serving his 13-year sentence.Justin Sullivan/Getty Images Tags Tech Insider, News, Healthcare, Law, Ramesh Balwani, Sunny Balwani, Elizabeth Holmes, Elizabeth Holmes trial, theranos, Theranos trial, Trial, fraud trial, Features, Business Visual Features Source Meet Sunny Balwani: Theranos No. 2 and Elizabeth Holmes' ex-boyfriend who just …