Theranos Lab Chief Says He Found Blood-Test Tech Didn’t Work

Kingshuk Das, the failed startup’s lab director in its final years, is expected to testify at founder Elizabeth Holmes’s fraud trial that management resisted his concerns about unreliable technology.Kingshuk Das, the failed startup’s lab director in its final years, is expected to testify at founder Elizabeth Holmes’s fraud trial that management resisted his concerns about unreliable technology.Read MorePAIDWSJ.com: US Business