Elizabeth Holmes is facing a setback in her efforts to get a new trial.

On Monday, a witness at the center of one of her arguments 

for a legal do-over said he stood by the testimony 

he gave that helped convict the Theranos founder on fraud and conspiracy charges in January. 

Speaking at an evidentiary hearing in San Jose, California, Adam Rosendorff 

a former lab director at Theranos, said, "At all times I testified truthfully and honestly to the best of my recollection." 

"I don't want to help Ms. Holmes," Rosendorff added. "The only person that can help her is herself. She needs to pay her debt to society." 

The accuracy of Rosendorff's testimony had been thrown into question in recent weeks after he went to Holmes' home in August