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An abusive ex-boyfriend is suspected in a woman's disappearance, but a carpet stain and a set of keys lead investigators in another direction. (Repeat).

The police find a murder suspect on the scene after a child calls 911 about his dead father. But when forensics clears the man, the police must rely on DNA evidence to find the real killer. (Repeat).

The sexual assault and murder of a woman in her apartment is investigated. The police have no evidence to prove their prime suspect's guilt, but another woman's tragedy may help them solve the case. (Repeat).

The case of missing stewardess Helle Craft is recounted. Although her body was never recovered, police used forensic evidence to charge her husband with murder. It became the first murder conviction without a body in Connecticut. (Repeat).

The sexual assault and murder of a woman in her apartment is investigated. The police have no evidence to prove their prime suspect's guilt, but another woman's tragedy may help them solve the case. (Repeat).

The case of missing stewardess Helle Craft is recounted. Although her body was never recovered, police used forensic evidence to charge her husband with murder. It became the first murder conviction without a body in Connecticut. (Repeat).

The first case to use DNA evidence is detailed. In 1983 Leicester, England, police were stymied by a rape/murder of a 15-year-old girl; three years later, faced with a similar crime, they turned to Dr. Alec Jeffreys, a molecular biologist with a revolutionary approach to solving the case. (Repeat).

The use of non-DNA evidence to solve crimes is detailed. (Repeat).

The case of Timothy Spencer is related. Dubbed the Southside Strangler, he was the first serial killer convicted on DNA evidence. During a three-month span during 1987, he raped and murdered three women in Richmond. (Repeat).

An examination of "Legionnaires' Disease," so named after it decimated a 1976 American Legion convention in Philadelphia. One hundred and eighty attendees developed pneumonia-like symptoms; 29 individuals died. (Repeat).

The murder of Huntsville, Ala., doctor Jack Wilson is examined. A handyman confessed to the crime, but claimed that Wilson's wife and her twin sister paid him to kill the husband. Based in large part on the handyman's testimony, the wife was convicted. However, the sister was found not guilty, despite the fact that the prosecutors used the same evidence. (Repeat).

The John List case is detailed. In 1971, he murdered his wife and children---and promptly vanished. It wasn't until 1989 that he was caught, when the TV show "America's Most Wanted" spotlighted the case. (Repeat).

Escherichia coli (E-coli) bacteria can be found in meats, milk and in water. When food is properly processed, prepared and stored, E-Coli are harmless. But in the absence of these simple precautions, E-Coli can have deadly consequences. Raw Terror tells the story of Damion Heersink, an eleven-year-old boy who almost died after eating an improperly cooked hamburger teeming with E-Coli, and the peop

The hunt for a serial killer who plagued the Tampa area during the 1980s is recalled. The case broke wide open when the perp released a victim rather than killing her and she was able to give the police enough information to track him down. (Repeat).

Stories from across the world and refreshing conversations. (Repeat).

Stories from across the world and refreshing conversations. (Repeat).

Manu Raju leads an in-depth conversation on the week's most important political storylines, with a diverse set of analysts and news-making interviews. (Repeat).

In Southwest Florida, Terrance Williams, a young father, disappears. As his mother retraces his steps, she uncovers something ominous: the last known person to see Terrance alive has a disturbing connection to another missing man. The Season 5 premiere. (Repeat).

Sex and murder are often tied together in criminal investigations; and detectives uncover dirty secrets, scandalous sex affairs, online sex addictions, jealousy, and stunning twisted fantasies when looking for motives for murder. (Repeat).

Sex and Murder are often tied together in criminal investigations. In this series, detectives uncover dirty secrets, scandalous sex affairs, online sex addictions, jealousy and stunning twisted fantasies when looking for motives for murder. (Repeat).

A killer stabs Jeff Wright 193 times and buries him in the backyard of his own home. (Repeat).

A romantic and scenic early morning boat ride turns deadly when Larry Isenberg falls overboard. Investigators reveal the disappearance of half a million dollars, which could be a motive for murder. (Repeat).

Twenty-four-year-old Alex Woodworth is brutally stabbed 16 times and left for dead hanging halfway out of the killer's car. As investigators peel back the layers, it's revealed the killer's many lovers is motive for murder. (Repeat).

After a couple in Hambleton, England, disappear, the police suspect that their grown son murdered the pair. The lack of bodies stymies the case, however. (Repeat).

A look back at a December 1990 accident on Route I-75, near Calhoun, Tenn., that involved 99 vehicles and resulted in 12 deaths. The investigation focused on whether human error, the weather or a combination of the two was to blame. (Repeat).

How DNA evidence helped bring in a suspect in a sex crime. (Repeat).

The flu-like symptoms of a mother and her children proved to be indicative something much more serious: thallium poisoning. Investigators had to find the source of the poison... and when the mother died, to determine if the exposure was accidental, or if they also needed to find a killer. (Repeat).

The police investigate an odd case involving a farmer who is being harassed by a neighbor. (Repeat).

Investigators in Cleveland try to determine why infants are bleeding from the lungs. An airborne fungus is suspected. (Repeat).

The investigations of two seemingly random deaths in Seattle lead the authorities to a connection: over-the-counter medication that was tampered with. (Repeat).

An investigation into threatening letters sent to an elementary school teacher leads the police to an unlikely suspect. (Repeat).