Dentist charged with murder in wife's poisoning and alleged affair with mistress.

A Colorado dentist, James Toliver Craig, has been formally charged with first-degree murder for allegedly poisoning his wife, Angela Craig, with arsenic and potassium cyanide. Angela was hospitalized three times in 10 days before being declared medically brain dead and taken off life support. Investigators believe James administered the poison through protein shakes he regularly made for his wife. The couple shared six children, and Angela's sister described their marriage as tumultuous. James Craig had reportedly searched online for information on poison and purchased arsenic and potassium cyanide before his wife's death.