Charles Andrew Gardner

Just As A Snake Sheds Its Skin. Scott's loyalty is challenged. The annual random drug testing puts a doctor's career in jeopardy. Choi tries a risky old-school method on a patient. Halstead helps Hammer search for her mother.

When the crushed body of a young teen who ran away from a treatment center for troubled girls is found in an abandoned building, Voight sends Halstead under cover as a guard to investigate the center from the inside.