Md. Code, Criminal Procedure § 11–110

In addition to testing allowed under § 11–112 of this subtitle, the court may order a person charged with a prohibited exposure to give a blood sample to be tested for the presence of HIV or hepatitis C if:

(1) the person is charged with a prohibited exposure within 1 year after the prohibited exposure occurred;

(2) a victim or victim’s representative requests the testing in writing to the State’s Attorney in the county where the prohibited exposure occurred; and

(3) the court finds probable cause to believe that a prohibited exposure occurred.