Dennis Murphy

The homicide of private first class soldier and young mother Karlyn Ramirez; a glimpse into the FBI's crime lab and an in-depth look at how multiple agencies uncovered a plot that spanned several states and prompted suspicions of espionage.

Investigators didn't know if Kathy Heckel was a missing person or murder victim; decades later the case is reopened by a new detective.

An Idaho woman's affair with her married boss leads to a lethal confrontation.

A woman continues searching for answers after the investigation into her daughter's murder goes cold.