Craig Lamar Davis is accused of exposing women to HIV, a felony under Georgia law punishable by up to 10 years in prison. But the medical tests used to detect the virus will be as much on trial in a Clayton County courtroom this week as the 42-year-old Davis.

Davis’ attorney - with the help of a controversial Los Angeles-based nonprofit called the Office of Medical and Scientific Justice - plan to argue that HIV tests are largely inconclusive and thus Davis may not have HIV. Clayton County prosecutors will counter that argument with a battery of medical experts and documents that show that HIV is indeed real.

The trial, which is expected to take at least several days, is scheduled to get underway this morning in Clayton County Superior Court Judge Geronda V. Carter’s courtroom.