Theranos CEO Elizabeth Holmes promised investors that her company could revolutionize blood tests. But after 11 wire-fraud charges and 15 weeks of a court trial, yesterday a jury found Holmes guilty on four counts. WSJ's Sara Randazzo, who has been in the courtroom, explains what this means for Holmes and why this trial was a referendum on how Silicon Valley startups raise cash. Learn more about your ad choices. Visit megaphone.fm/adchoices