Former Theranos CEO Elizabeth Holmes was convicted on four counts of fraud and conspiracy Monday, ending a lengthy trial that has captivated Silicon Valley. The jury found her not guilty of four other felony charges. On the three remaining charges, the jury was deadlocked. Holmes, a once-celebrated entrepreneur, was accused of duping investors and patients about a flawed blood-testing technology that she hailed as a medical breakthrough. Nine of the 11 counts are fraud charges and two revolve around a conspiracy to commit fraud from 2010 to 2015. During that time, Holmes became a Silicon Valley sensation, one worth $4.5 billion on paper based on her promise that Theranos' technology would revolutionize health care. Holmes, 37, could face up to 20 years in federal prison.