The Colorado dentist accused of poisoning his wife's protein shake with arsenic and cyanide made an appearance in court. Dr. Jim Craig was formally charged with first-degree murder. It comes as more details of Craig's alleged romantic relationship with an orthodontist named Dr. Karin Cain emerges. In an arrest warrant, cops say he bought her an airline ticket to fly from Austin to Denver while his wife, Angela, was in a hospital fighting for her life.
