More charges against a male nurse arrested after authorities say he engaged a teenage boy in a sexual performance during unnecessary medical tests this month at a medical facility near West Columbia...

Investigators say he is not really a nurse.

28-year-old Kerston Turner is charged with presenting himself as one – and practicing as a licensed practical nurse – while providing medical services to the boy at the MedCare Urgent Care Center.

But Lexington County Sheriff's Major John Allard says Turner is only a nursing assistant.

The arrest warrant further alleges that Turner, who had the word 'nurse' tattooed on one of his forearms, performed unlawful services on the 16-year-old boy that were outside the scope of Turner's certification as a certified nursing assistant and constituted a sexual assault on the 16-year-old boy,” Allard says.

Authorities are asking anyone with information about additional criminal activity involving Turner or other instances where he may have acted inappropriately with children to contact the Sheriff's Department.