When Sonya Ivanoff is found shot to death near the remote village of Nome, Alaska, detectives rely on forensic science to catch her murderer.
When 80-year-old Dorothy Murphy is murdered after leaving the house to run errands, investigators discover her case is tied to an unsolved drive-by shooting.
In the late 1980s, an elusive serial killer stalks the streets of Los Angeles. Two decades later, new technology puts an end to The Grim Sleeper's reign of terror.
When a little girl disappears from a small town, detectives look at suspects close to home. Forensic science and a tip leads to a trusted friend with a dark past.
The torture and murder of a mother shakes the community of Newton to its core. When another woman goes missing, police learn that the cases might be linked.
When a mother is murdered in the night, her sadistic killer left no evidence behind. Then, months later an attack in another state seems to be by the same person.