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 former detective Steven Lampley, North Carolina family and divorce lawyer Kathleen Murphy, New York psychologist Caryn Stark, and Crime Stories reporter Nicole Partin.

How do you protect your children from predators? Join Nancy Grace and a team of world-class experts for the online course ‘Justice Nation: Crime Stops Here’.

High school teacher shot ex-husband’s girlfriend dead as she decorated Christmas tree with suspect’s twin toddlers: Report

“Crime Stories with Nancy Grace” is also a national radio show heard on SiriusXM channel 111 airing for two hours daily starting at 12 p.m. ET and around the country on local radio stations. You can also subscribe and download the daily podcasts at Apple Podcasts and Google Play.

Join Nancy Grace for her new video series new online video series designed to help you protect what you love most – your children.

[Feature Photo: Lisa Williams/Facebook]