When a witness reveals the truth behind a sniper shooting on Alaska's busiest highway, it ignites an explosive revenge plot that leaves a community reeling and a family torn apart.

An armed stranger takes Deanna and her grandmother hostage two days before Christmas; as police in South Carolina piece together a brutal murder spree, they have no idea that the killer is close by holding a woman and her granddaughter hostage.

Investigators discover two cases decades apart that are linked when a woman falls to her death in the Grand Canyon.

A serial killer targets homeless people in Orange County, Calif., and a young man stands accused of murdering his family.

When detectives identify a brutalized body in the desert, they never expect she's one of many; three homicides are linked to convicted killer Phillip Jablonski, who records details of his killings in his grim audio diary.

A bombing in rural Alaska triggers a multi-state manhunt and leaves a community terrified; as investigators dig deeper, they discover an evil family plot for revenge.