Ramesh Sunny Balwani , who served as the president and chief operating officer of ill-fated blood-testing company Theranos , was sentenced to 12 years and 11 months in prison Wednesday for his role defrauding patients and investors.

Balwani is the most well-known figure associated with Theranos after founder Elizabeth Holmes , who was sentenced last month to more than 11 years in prison for swindling investors out of hundreds of millions of dollars. The two were engaged in a clandestine romantic relationship for more than a decade until 2016, right around when the company began collapsing under the weight of their false promises about Theranos technology.

Balwani received the sentence from U.S. District Judge Edward Davila, who sits on the federal court in the Northern District of California and also oversaw Holmes trial and sentencing. Balwani must surrender on March 15.