After computer whiz Cari Farver goes missing, she starts sending threatening text messages to her new boyfriend, his ex-lover and her mother; it's up to the police to determine if she's a deranged stalker or a murder victim.

Young mother Tyshika Askins is found strangled to death in her home; after charging the wrong man, police realize the key to solving the case lies in an orange juice container left out on a kitchen counter.

Las Vegas police hunt for the monster who raped and murdered a high school sophomore before he strikes again.

A 59-year-old grandmother is discovered beaten and stabbed to death in her home on Mother's Day.

In Pensacola, Fla., a beloved barber is gunned down in his shop in broad daylight; DNA left at the crime scene may hold the answer to solving this murder mystery.

After grandmother Irene Kennedy is found dead in a park, a distant relative is charged with her murder, splitting her family apart; it will take years, another killing and a jail house snitch to bring the family back together.

Young mother Nancy Klinger goes missing after telling friends she's working undercover on a black-market baby sting.

A 19-year-old convenience store clerk vanishes in Sheridan, Wyo.; a gruesome discovery seems to point police to a cold-blooded killer.

Anna-Sigga Nicolazzi meets with the detective and prosecutor who took on the case of Karen Ann Watson, a wife and mother who was brutally stabbed to death in 1987; nearly 30 years later, they track down a killer who thinks he got away with murder.