A young woman is shot execution-style in her kitchen while her daughter cries in the next room; the killer weaves an intricate web of lies, and it takes a team effort on behalf of the investigators and prosecutors to reveal the truth.

A stranger brutally attacks two young women in a park in Portland, Texas; one victim is killed, while the other miraculously survives; with the help of the survivor, investigators hunt for the killer before he can strike again.

A young mother's lifeless body is found floating deep in the Louisiana bayou, and local police are stumped as to how she wound up dead nearly 300 miles from her Texas home; there is little physical evidence, and there are no eye-witnesses.

Kelsey Monahon, a young pregnant woman, is found tied up and strangled to death in her Milford, Conn., home; a chance encounter leads investigators to uncover a story of greed involving a dangerous prison pen pal.

After Lisa Fein disappears from her rural Michigan home, her young son tells police he saw her being attacked by a man in a snowmobile helmet; after a three-day search, Lisa's body is found in a shallow grave; police set their sights on three people.

A new job in a new town seems like a promising start for expectant parents Kent and Malinda Gibbons; then, life turns into a nightmare after Kent finds Malinda raped and murdered at home; detectives find themselves in a race to stop a killer.