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.

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.