Popular high school teacher allegedly guns down hubbys new girlfriend decorating Christmas tree in front of tot twins

Published: Dec. 4, 2018, 6 p.m.

b"Chelsea Cook, a health teacher at a Salt Lake City high school, allegedly fatally shot her ex-husband's girlfriend while visiting her children to deliver cough medicine. The girlfriend was reportedly helping the kids decorate their father's Christmas tree when the attack happened in the apartment. Nancy Grace looks at the shocking case with\\xa0former detective\\xa0Steven Lampley,\\xa0North Carolina family & divorce lawyer\\xa0Kathleen Murphy,\\xa0New York psychologist\\xa0Caryn Stark, and Crime Stories reporter Nicole Partin."