A cigarette butt may provide the evidence needed to catch a serial rapist.
New evidence points to a different killer in the case of a dentist's murdered wife.
Insects and a strand of hair unravel the truth behind the murder of a woman and her infant son.
A decomposed body is found in a barrel, and a dilapidated address book may hold the answer.
When a policeman's home is burned to the ground, he later arrests a man who confesses to the arson, but the confession is dubious.
A woman identifies her husband as her attacker, but questions arise 16 years later regarding her recollections.
A mother and her two young daughters are found brutally murdered and sexually violated; the crime scene has no shortage of evidence, but investigators cannot find a conclusive link to their prime suspect.
A young girl is found dead, the victim of an apparent sex killer; there are few clues to the killer's identity, but authorities are intrigued by unusual orange fibers embedded in clothing found near the victim.
Medical detectives believe a murder suspect may not have killed his wife after all.
Children die at an alarming rate at a Texas hospital, and one nurse may be involved.
When the decomposed body of a young girl is discovered, police have no clues to her identity; but days earlier, a stabbing victim told them she thought she might have witnessed a murder.
When a doctor's wife disappears, investigators use concrete from the doctor's yard and the recollections of a child to determine what happened.
When a young woman disappears, investigators discover that she has been living a double life.
Investigators look into the death of a popular gym teacher and discover that his death was not an accident.
When a gym teacher is found shot to death, the police suspect his wife of foul play, and a videotape recorded by the victim reveals his strange marriage.
When a heart surgeon is found dead, investigators uncover his new wife's history of violence.
A prosecutor helps make video testimony viable in other cases.
A convenience store security camera captures footage of an employees's murder.