Police have DNA evidence and a videotape of their suspect, yet they still struggle to find a vicious killer.

A hidden clue may hold the key to solving the vicious murder of a young woman.

A teenager's shocking murder shatters the peace in a small town and destroys her family.

A look at three cases in which the quest for justice rages on after the verdict has been delivered.

A young woman is found murdered in a busy parking lot. Will the treasure trove of evidence police discover be enough to catch her killer?

A young woman about to start a Hollywood career mysteriously disappears off Interstate 10.

A 36-year-old woman is savagely murdered while her 7-year-old niece is asleep in the next room.

A teenager is murdered the night before her college career was about to begin.

The police follow a trail of emails, hoping it will lead them to a vicious killer.

A young girl's mysterious disappearance leads police and her family on a tormenting journey.

When a teenager is found savagely murdered, police must retrace her last steps alive to identify her killer.

A military police officer is found murdered in her own home, sending police on a twisted journey for answers.

A deadly predator haunts the city of Stockton, California.

Will a 14-year old girl, killed while walking her dog, provide police the key to solving her murder?

A loving mother of three is found mysteriously shot to death just steps from her home.

When a young woman disappears before her final shift at a Maryland hospital, her family begins a decades-long search for answers.

Police try to retrace a young mother's last known movements in an attempt to solve her mysterious disappearance.

Police suspect a mysterious double homicide is not what it appears to be.

After a young girl vanishes on the way home from school, her family and police embark on a search for answers.

A 12-year-old girl is kidnapped during a home invasion, and police frantically search for her and her abductor.