A national group that disputes the reliability of HIV testing has weighed in on a Clayton County case involving a man accused of knowingly exposing women to the virus.

Craig Lamar Davis faces two counts of reckless HIV, a felony under Georgia law punishable by up to 10 years in prison. The trial is expected to start with jury selection at 10 a.m. Monday in Superior Court Judge Geronda Carter’s courtroom.

Davis, who lives in south Fulton, was arrested in July 2012 by Atlanta police. A Union City woman told authorities that Davis had sex with her four times before telling her he was infected with HIV, according to the initial report filed with Clayton police. The incidents were alleged to have taken place at a home in Clayton between May and June of 2012.

Davis also faces similar charges in Fulton County involving a different woman.

Clark Baker, founder and director of the Office of Medical and Scientific Justice, a Los Angeles-based nonprofit, contacted Davis’ attorney, John Turner, offering his organization’s help for free.

“We expect this case will corroborate what we’ve found in all of our other cases … and that is the testing, diagnosis and treatment of HIV in this country is wildly inaccurate and inflated and incompetent,” Baker said.

The nonprofit is providing three experts to testify for the defense — a doctor it says has done research in infectious diseases and two people with background in HIV testing.

Clayton District Attorney Tracy Graham Lawson could not be reached for comment, but in the indictment the prosecution maintains that “after obtaining knowledge of being infected with HIV,” Davis “did knowingly engage in sexual intercourse” with the woman without disclosing that he was HIV-positive.

However, Turner said, “The whole thing is going to boil down to whether the state can prove he’s HIV-positive. We don’t believe the state will be able to conclusively show that my client is HIV-positive.”

Baker, a retired Los Angeles police officer, said his group concluded that “there’s no evidence or symptoms at all of HIV infection in Mr. Davis.”

Baker said his group has been involved in more than 100 HIV-related criminal cases since its inception in 2009. Many of the cases are still open, but of the 60 that have been concluded, he said, the group has been on the winning side in 57.