Elizabeth Holmes takes the stand in her criminal fraud trial

SAN JOSE, Calif. (AP) – Fallen Silicon Valley star Elizabeth Holmes, accused of bamboozling investors and patients into believing that her startup Theranos had developed a blood-testing device that would reshape health care, unexpectedly took the witness stand Friday in her trial for criminal fraud.

The decision to have Holmes testify so early came as a bombshell and carries considerable risk.

Federal prosecutors, who rested their months-long case earlier on Friday, have made it clear that they’re eager to grill Holmes under oath.

Over the course of more than two months, the prosecution called 29 witnesses and presented numerous internal documents to make their case.