SAN JOSE — The federal judge overseeing the criminal wire fraud case against Theranos founder Elizabeth Holmes and the company’s former COO and president Ramesh Balwani didn’t tip his hand during defense lawyers’ arguments Monday seeking to knock out criminal charges.

Federal prosecutors have claimed the pair misled investors and patients, and that Holmes and Balwani knew Theranos’ blood analyzer could not deliver on the public promises they were making to provide “fast, inexpensive, accurate, and reliable” tests.