Police suspect Aurora dentist of poisoning wife to death.

An Aurora dentist, James Craig, has been arrested on suspicion of first-degree murder after his wife died days after being hospitalized and declared brain dead. Police say Craig drove his wife to a hospital because she was suffering from severe headaches and dizziness, but her condition deteriorated rapidly and she was declared medically brain dead. Investigators learned of "suspicious details" in the woman's death and determined it was "a heinous, complex and calculated murder." It is not clear what poison was used or what evidence led investigators to arrest Craig.