(MSC News)--Testimony began Monday in the trial of a former physician assistant accused of sexually abusing patients at a Leavenworth veterans affairs hospital.

Mark Wisner, of Horton, is charged in Leavenworth County District Court with one felony count of aggravated sexual battery, one felony count of aggravated criminal sodomy and three misdemeanor charges of sexual battery.

The crimes are alleged to have occurred between 2012 and 2014 while Wisner was working at the Eisenhower VA Medical Center.

Following jury selection and opening statements, The Leavenworth Times reports only one prosecution witness testified Monday.

The witness, who was injured while serving in Iraq, accused Wisner of performing inappropriate examinations. In response to a question during cross examination, the newspaper says the witness said he considered the examinations to be overtly sexual.

Four days have been set aside for the trial