A 20-year-old woman sets out on her bike and never returns. Her body is found a few miles from her house, with a gunshot wound to the head. Eventually modern technology breaks the case. S16 Ep4
Forensic science helps solve real crimes. Examiners discover curious puncture wounds on the body of a dead politician. Find out if they relate to his death and if he was in fact murdered. S13 Ep4
When a woman is murdered in a Phoenix bar, investigators find foreign hairs and unknown fingerprints, but the most telling piece of evidence is the bite mark on her chest. S8 Ep7
The mysterious murder of a young teacher's aide leaves a big hole in her small community. Generations of investigators and a scientific breakthrough leads to a shocking end to a tragic case. S16 Ep5
When the bodies of a woman and her son are discovered in a field, insects found on the bodies and a suspicious blonde hair help to track down the killer. S5 Ep3
A woman's death in Pennsylvania triggers an investigation into another death in North Carolina. Similarities are striking, and examiners must determine if they are linked. S8 Ep8
A building manager finds the lifeless body of a young woman in her first apartment. The case goes cold, then a new forensic tool examines the old evidence. Will science crack the case? S16 Ep6
Crimes are solved using advanced medical techniques. Investigators believed a young woman took her own life after they discovered her body under a bridge, but evidence suggested otherwise. S13 Ep7
When a pregnant woman was attacked, her unborn child was killed. She accused her husband, who spent years in jail until new DNA evidence emerged. S5 Ep6
When a nurse discovers that she's HIV-positive, science was able to determine not only how she had been infected, but also by whom. The worst part: it wasn't an accident. S8 Ep9
A single mum looking for love vanishes without a trace. Foul play is confirmed when a pickup truck toolbox opens to reveal her body stuffed inside. Can forensic evidence connect the dots? S16 Ep7
Time of death becomes pivotal after a woman is found murdered in an air-conditioned room. Similarities between her death and a movie provide clues to find the killer. S8 Ep10
A woman is found dead in a ravine. Evidence had been washed away. Almost 20 years later, an old hat and a chip of stainless steel brought the killer to justice. S8 Ep22
After a girl disappeared from a town in Alaska, her body was discovered 10 days later; she'd been shot twice at close range, and sexually assaulted. S8 Ep23
Before a witness is to testify against the man accused of assaulting her, she is murdered. Investigators suspect her attacker, but don't have evidence to prove his guilt. S8 Ep24
A serial killer indicated he would kill twelve people, one for each astrological sign. Investigators got profile of the killer, and a stroke of luck enabled them to find him. S8 Ep25
In 1993, Florida was known for attacks on tourists. An injury to a victim - a bite mark - would be a key piece of evidence used to convict an uncooperative suspect. S8 Ep6
A woman is shot to death a day before she was meant to testify against the man accused of robbing her. The robber becomes the prime suspect, but he has a solid alibi. S8 Ep5
A girl admits the testimony that helped convict her uncle of murder was untrue, so his wife tries to find the real killer, hoping her husband can be cleared. S12 Ep19
When a missing woman's body is discovered a month later, witnesses say she was forced into a car. The car had been rented, but the signature didn't match the suspect's. S8 Ep4
When a killer leaves some cigarette butts behind at a murder scene, a ground-breaking DNA test points Napa County police towards an unlikely suspect. S12 Ep15
In 1962, 15-year-old Marlene Miller was murdered. It would take 24 years before forensic scientists discovered microscopic evidence that brought her killer to justice. S8 Ep3
One of forensic history's more bizarre cases sees investigators solve a murder with the help of a squashed tomato and pinpoint reflections in a photo. S12 Ep5
The search for the murderer of Shari Faye Smith, who was forced to write her last will and testament after she was abducted, and send it to her family. S7 Ep42
After a little girl was run over, her mother took the case into her own hands and used her knowledge of murder mysteries to find the vehicle responsible. S6 Ep29
Police suspect a woman of murdering her husband after they find his body on the roadside, but she tells them he went jogging and never came back. S7 Ep39
Investigators turn to satellite surveillance to track down the abductor of a young girl. When they find her, a hidden fingerprint helps solve the case. S6 Ep25
Laura Houghteling left her home to walk to the train station - and was never seen again. A strand of hair found in her hairbrush helped investigators unravel the mystery. S3 Ep35
The discovery of a baby girl's body after an alleged kidnapping led to the revelation that the infant's sister also went missing in very similar circumstances. S3 Ep32
A Californian doctor claims to have proof that the human form of BSE (Bovine Spongiform Encephalopathy) can be contracted through eating infected beef. S3 Ep30
The largest water-borne outbreak of gastrointestinal illness in the US, when bad weather conditions contaminated Lake Michigan with manure from Wisconsin's dairy herds. S2 Ep26
The use of forensic evidence to solve crimes, focusing on the discovery of a woman's charred remains which led police to uncover a tale of drugs, greed and murder. S2 Ep21
The bodies of two women are found after an apartment fire, and a small sample of blood helps police investigate their suspicions about the case. S8 Ep29