A jealous security guard guns down his ex, the mother of his child, in a gruesome medical lab execution.

Then, instead of showing remorse, he brags to cops he'd "kill her again."

A mom and doctor die freezing  to death in a Dollar Tree freezer. Now,  her family is filing a $50 million lawsuit, and the allegations are chilling.

Plus, a beef over dinner turns deadly!  Jennifer Gould reports. Autopsies for Spencer and Monique Tepe are complete, and show a much different scene of the murders than previously thought.