Theranos founder Elizabeth Holmes asked for a new trial, claiming a key witness in her criminal case visited her after the verdict and expressed misgivings about his testimony.

Holmes said in a Tuesday court filing that Adam Rosendorff, a former Theranos lab director, showed up at her home on Aug. 8 and explained to her partner that his testimony last fall had been twisted by prosecutors.

The allegations about a key government witness at the highest-profile trial in Silicon Valley history come eight months after Holmes was convicted of fraud and just weeks before she’s scheduled to be sentenced.

Rosendorff testified during Holmes’s trial that he emailed her about his concerns that the company’s blood analysers weren’t ready for an imminent commercial roll-out at Walgreens drug stores.

When he visited her home last month, Rosendorff was met at the door by Holmes’s partner, Billy Evans, and explained that “he tried to answer the questions honestly at Ms. Holmes’ trial, but the government tried to make everyone look bad,” according to her filing.

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“Under any interpretation of his statements, the statements warrant a new trial,” a lawyer for Holmes said in the filing. At a minimum, the court “should order an evidentiary hearing and permit Ms. Holmes to subpoena Dr. Rosendorff to testify about his concerns.”

Holmes, 38, was found guilty of defrauding investors and conspiracy for her role in the collapse of the blood-testing startup she founded that reached a peak valuation of $US9 billion. Her ex-boyfriend and former Theranos President Ramesh “Sunny” Balwani was convicted in July on similar counts, as well as defrauding patients.

Tuesday’s filing comes after the judge last week issued a preliminary ruling rejecting Holmes’s long-shot attempt to get her fraud conviction thrown out. Holmes’s bid for a new trial is another gamble that almost all white-collar criminal convicts make, and rarely win.