The murder of an Ohio woman in 1974 is solved more than 20 years later after police get a crucial clue--the woman's husband was seen building a coffin-shaped box about the time the woman disappeared.

The suspicious death of 2-year-old Billy Blankenship is solved when police force his babysitter to re-enact the circumstances of his death. Then, a murder case is solved when the dead man's body is accidentally found by divers.

A woman's fall from a cliff in the Grand Canyon leads police to uncover a series of grisly murders, and investigators smoke out a killer when they find crucial DNA evidence on his cigarette butts.

A killer helps convict himself when he boasts about his crime to prison cellmates; and New Hampshire investigators probing the murder of a pregnant woman found raped, strangled, and dumped into her bathtub, get a new lead.

A 13-year-old girl's mother is murdered and 20 years later she helps bring the killer to justice; and a dogged policeman gets to the bottom of the brutal murder of a 63-year-old newspaper delivery woman.

Investigators in Virginia, probing the murder case of a sailor, seek the help of a forensic anthropologist from the "body farm" in the Great Smoky Mountains. Dr. William Bass became an expert on the human body's rate of decay by watching bodies rot.

A New Orleans police officer goes undercover on a Baton Rouge riverboat to gain a confession from one of the ship's maintenance workers who is suspected of murder.

A sunset boat ride in Florida leads to death for a vacationing woman and her two daughters, and police investigate a Texas man whose three wives all died in mysterious fashions.

Forty-one years after the crime, a woman implicates her brother and cousin in the murder of a New Jersey policeman.

Using a hair dryer to thaw a frozen corpse, detectives get to the bottom of a grisly murder. And the discovery of a child's skeleton in a Chicago garden puts police on the trail of an "oddball" family.

The murder of scientist Helena Greenwood, who was helping to develop DNA forensic technology when she died, is solved 12 years later with the help of DNA evidence.

When a passing motorist spots a fire along a country road in South Carolina and calls it in, police arrive to discover the badly burned and battered remains of a woman, her skull smashed into 97 fragments.

The story of serial killer James Rodney Hicks, who left a trail of bodies and kept police, prosecutors, and the FBI quite busy working on his cases for over 20 years.

The accidental discovery of a human scalp leads to the conviction of a man for murder 18 years after the killing.

DNA evidence helps crack the case of a white supremacist who strangled his girlfriend and put her body in a refrigerator, and hypnosis helps solve the murder of a deputy sheriff.

The killer of four women goes free until cold case detective John Little is brought in and finds key evidence on a coffee cup. This portrait of a ruthless murderer includes tapes of his chilling confessions.

Police solve a murder when divers find a skeleton in a car at the bottom of a river, and a dead dog's DNA helps crack open a six-year-old case.

In Wisconsin, advances in forensic clay modeling help investigators identify a murder victim whose skin was stripped from her head, neck, and legs. And in California, police track down two boys who enjoy satanic rituals and setting fires.

In 1989, socialite Susan Doll was found beaten, raped, and strangled in Colorado. Investigators extracted DNA from a semen stain, but had no suspect to match it against--until 1995 when a local landlord found 25 pairs of panties stuffed into a furnace.

A highly-regarded California arson investigator is suspected of setting a series of fires, and in Texas, a man is convicted of raping and murdering his 68-year-old neighbor.

A tipster's phone call helps solve the murder of the heir to the U-Haul company fortune, and a grisly murder case is solved two decades later with the use of new fingerprint technology.

A man in Florida is reported missing and his roommate at the time, who tried to take over his business, is the main suspect. But he has an alibi. Then, at first it looks like L.A.P.D. Sgt. George Arthur died in a car crash.

Cold Case Units use psychological profiling, forensic anthropology, and a convicted felon's rekindled memory to heat up old cases. In Missouri, a part-time missionary is convicted, 38 years later.

In Vancouver, DNA tests identify a skull of a 14-year-old boy who went missing 6 years earlier. When a second skull is found, investigators fear they have a sexual stalker and killer in the area.