Police investigating the 1984 murder of a college student had plenty of suspects, but no conclusive evidence linking any of them to the crime. More than a decade later, sophisticated technology would breathe new life into a case grown cold with the passage of time.

The episode was rated 8.07 from 15 votes.

Whoever stabbed the young mother to death had also savagely beaten her four-year-old daughter. Police had a suspect, but not enough evidence to tie him to the crimes. It would take 15 years and advances in DNA technology to bring the killer to justice. Originally aired as Season 13, Episode 47.

The episode was rated 8.08 from 12 votes.

It was classic “overkill.” The woman floating in the harbor of an upscale yacht club had been stabbed more than 50 times. Her ex-husband and daughter are missing, and investigators turn to forensic science to determine if they’re searching for victims... or perpetrators. Originally aired as Season 13, Episode 15.Originally aired as Season 13, Episode 43.

The episode was rated 8.09 from 11 votes.

It was one of the most brazen crimes of the 20th century. Adolph Coors, chairman of the Coors Brewing Company, was kidnapped and held for ransom… prompting one of the largest manhunts in United States history. Originally aired as Season 11, Episode 41.

The episode was rated 8.10 from 10 votes.

Police say that a car crash, which killed an elderly woman, was murder and arson. The driver, the victom's daughter, insisted it was an accident. Two fire investigators came to two entirely different conclusions. Was it an accident... or murder?

The episode was rated 8.10 from 20 votes.

An assailant breaks into a couple's home with an axe; he kills the husband and critically injures his wife. Nothing was taken, so this wasn't a robbery. Can a DNA profile from skin cells collected hundred of miles away reveal the killer's identity and his motive for murder?

The episode was rated 8.11 from 19 votes.

Hikers near Anchorage, Alaska discovered a body wrapped in sheets that were edged in orange stitching. Authorities hydrated the fingers and obtained a fingerprint, enabling them to identify the victim. Clinging to the sheet, they also discovered a tuft of red carpet fibers – threads of evidence that led them straight to the killer. Originally aired as Season 9, Episode 24.

The episode was rated 8.15 from 26 votes.

There was no apparent reason for a young, healthy college student to be dead. But when the medical examiner found a tiny clue during the autopsy, investigators were able to unravel a mystery of betrayal and revenge.

The episode was rated 8.17 from 12 votes.

A young woman stopped her car along a busy highway in California. She was never seen again. For three years, the search for her where-abouts continued, but the trail eventually turned cold. So cold that forensic scientists needed new techniques to solve it.

The episode was rated 8.17 from 12 votes.

A young woman was found dead on a golf course in the Bahamas. The grass on that course was so distinctive that it had evidentiary value. The evidence led police to two suspects. Each blamed the other, and they had to find out who the killer was. Originally aired as Season 10, Episode 29.

The episode was rated 8.19 from 16 votes.

A woman disappeared without a trace, leaving two possible explanations: kidnapping or murder. Concern was heightened when police learned that two other women had similarly vanished. An investigation including DNA profiling and a talented forensic artist enabled police to link the crimes to a single suspect – an immigrant known to prey on vulnerable women. Originally aired as Season 9, Episode 23.

The episode was rated 8.19 from 26 votes.

A respected surgeon was stabbed to death in the parking lot next to his office. The most likely suspect is seen having dinner in a restaurant at the time of the murder. But a cryptic conversation leads police to believe that, while the suspect may not have wielded the knife, he could very well have hired the man who did. Originally aired as Season 13, Episode 40.

The episode was rated 8.20 from 15 votes.

The gunman opened fire as the family of four entered their home, killing two and wounding the others. He’d pulled open a few drawers to make it look like a robbery, but the scene was clearly staged. When police pieced together the clues, they discovered an unlikely suspect and a carefully orchestrated plot. Originally aired as Season 13, Episode 42.

The episode was rated 8.25 from 12 votes.

A drive-by shooting leaves one man dead and another seriously wounded. Cell phone calls and shell casings point to a suspect, but authorities are unable to place him at the crime scene. When a forensic geologist compared soil from the crime scene with soil found in the wheel wells of the suspect’s car, he proved that dirt is anything but dumb. Originally aired as Season 8, Episode 35.

The episode was rated 8.33 from 24 votes.

Terrified, the young girl hid in her bedroom while her mother was attacked and stabbed to death. Investigators had a wealth of evidence: shoe impressions, distinctive blood drops, and the killer’s DNA. What they didn’t have was a basis for comparison. Originally aired as Season 13, Episode 41.

The episode was rated 8.50 from 10 votes.