Witness
Mark Burnes
Physician who treated Mehrl Ellsworth and evaluated his conflicting prostate-specific antigen results.
AppearedFederal Criminal Trial
262 lines·3 appearances·5 mentions
About
Testifying as a government expert on PSA testing and interpretation, Mark Burnes described sharply inconsistent Theranos results for his patient, his efforts to obtain repeat testing, and why he regarded the initial elevated result as invalid. Cross and redirect addressed alternative sources of laboratory error, method variation, screening guidance, and his reliance on trends and confirmation before intervention.