Colorado Dentist Arrested for Poisoning Wife to Death.

A Colorado dentist, James Toliver Craig, has been arrested on murder charges after his wife was poisoned and declared medically brain-dead. Craig drove his wife to the hospital after she complained of severe headaches and dizziness. Police launched an investigation into her suspicious death and determined it was a "heinous, complex and calculated murder." Craig has been booked into jail and it is unclear if he has obtained an attorney.