If someone steals my kidney, and implants it in another, can I get my kidney back?

Rog is abducted by a very crazy doctor who has carefully selected him for his health, diet, and blood and tissue types that are compatible with his wife of 17 years who is certain to die without a kidney transplant.

After giving his wife one of his kidneys and nursing Rog to recovery, the doctor turns himself into the police confessing his evil misdeed. They arrest him and charge him with something very serious.

After one month Rog is in perfect health. He returns to his normal regime of weekly tennis. However, Rog is emotionally very scarred and wants his spare kidney back.

Can he have it back? Would he want it even if he could? Can he insist it be removed even if it is not possible for it to be put back inside of him.

Bonus: What do you charge the doctor with?