In this classic episode of Forensic Files, the longest running true crime series in television history, a college co-ed was abducted from her apartment's parking lot. Her body was found later that day; she'd been sexually assaulted, then shot at point blank range. Eight long years later, a pair of running shoes and a cell phone re-opened this cold case. Originally aired as Season 13, Episode 13.

When a college student is reported missing, police believe their investigation will be like countless others, and she'd turn-up a few days later. But when they discover blood spatter in her boyfriend's bedroom - blood spatter someone had gone to great lengths to conceal -- they know this case is going to be different. Originally aired as Season 13, Episode 15.

The victim has been stabbed more than thirty times, and the crime scene is awash with her blood. Near her head, police discover a distinctive button with strands of thread still attached. If they can find the owner of the shirt the button came from, they'll also find the killer. Originally aired as Season 13, Episode 17.

A young woman attends evening church services and then disappears. When her abandoned car is found, the tank is empty and a gas can is missing. Eyewitnesses place her at a nearby gas station, getting into a van, but their vehicle descriptions don't match. Three days later when her body is discovered, the search for the driver of that van intensifies. Originally aired as Season 13, Episode 18.

When a nine-year-old girl goes missing, police and volunteers spend weeks searching for her. A psychic's vision leads to a field where her body is discovered, along with what investigators hope is enough evidence to help them to also find her killer. Originally aired as Season 13, Episode 19.

Digital enhancement of security camera video shows that what appears to be a casual encounter is actually a forced abduction, leading to murder. The perpetrator's MO is remarkably similar to another murder that occurred five months earlier. When investigators learn the crimes might be related, they also realize a serial killer may be on the loose. Originally aired as Season 13, Episode 20.

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.

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 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.

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.

A state park employee is murdered in the park office in the middle of the afternoon. There's a wealth of evidence at the scene, but it doesn't implicate the prime suspect, it clears him. Six years and 600 leads later, advances in DNA technology enable investigators to identify and convict the killer. Originally aired as Season 13, Episode 44.

The evidence suggested the woman had been bound, sexually assaulted and murdered. Afterwards, the killer spent hours at the crime scene, wiping away his fingerprints and disposing of everything that might incriminate him, including the woman's body. Police face a daunting task: They have to find not only the killer, but also the victim's body. Originally aired as Season 13, Episode 45.

A couple spent Memorial Day weekend at the beach and then vanished. Their clothes and personal items were still in the rented condo, their car was parked outside, and there were no signs of foul play. A week later, police get an unexpected lead from a robbery in progress. The evidence they found helped solve a crime of unparalleled brutality. Originally aired as Season 13, Episode 46.

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.

In 2004, Mary Ann Clibbery was found viciously murdered in her Illinois business and police had to determine if this was a robbery gone wrong or a calculated crime. Their focus turned to the business co-owner, George Hansen, when police found that he was embezzling from the company. Originally aired as Season 13, Episode 1.

In 2006, Texas real estate agent Sarah Anne Walker was found murdered in a model home. Weeks later, a witness came forward who may have seen the killer. Police used forensic hypnosis to help him recall every detail of the man's appearance. His description was used to create a composite sketch which investigators used to pull the killer out of hiding. Originally aired as Season 13, Episode 2.

In 2003, Jason MacLennan returned home after a night out with friends and found his father's body lying in a pool of blood. There were shoe impressions outside in the snow. Police needed to determine who had the most to gain from his death. Originally aired as Season 13, Episode 3.

In 1999, Patrick McRae was found dead in his Des Moines home and the crime scene was covered with blood. Analysis showed it had come from two people, one of whom was female. The male DNA was McRae's, which meant the killer was a woman. The case went cold until a suspect told a tale of a dancer named Andrea Morris who listened to the voices in her head. Originally aired as Season 13, Episode 6.

In 2000, the body of a exotic dancer was found beneath a New Jersey bridge, making police believe she committed suicide. But evidence at the scene proved not only that she'd been carried to the bridge and thrown over the side, but also that she was alive when she fell. Originally aired as Season 13, Episode 7.

A construction manager was found dead in his work trailer in Ft. Worth, Texas. When investigators arrived, they discovered that he had been stabbed 46 times, described as overkill and indicating a personal relationship between the victim and the attacker. But finding DNA evidence would turn out to be more than a challenge. Originally aired as Season 13, Episode 8.

In 2000, Judy Southern came home from work and was shot by a gunman waiting for her. Her husband Allen arrived afterwards, called 911 and drove her to the hospital. She died on arrival and the investigation focused on her husband Allen, but forensic analysis and a suicide note found at the scene pointed to someone else. Originally aired as Season 13, Episode 9.

Dorothy Donovan was killed in her Delaware home and police were skeptical when her son Charles Holden claimed that she was murdered by a hitchhiker he had picked up. Their suspicions were raised when he refused to take a polygraph test, so they turned to forensic science. Would the blood and fingerprint evidence support Charles' story or prove his guilt? Originally aired as Season 13, Episode 11.

A woman in the back of a truck was flailing her arms, screaming. Witnesses thought she was doing something dangerous for the fun of it. But when police found a jacket near a pool of blood, they knew what people had seen wasn't a joy ride; it was an abduction. Originally aired as Season 13, Episode 24.

When court clerk Peter Porco doesn't report to his work, a courts officer is ordered to the Porcos' family home in Bethlehem, NY. Inside the home he discovers Peter Porco dead and his wife barely alive. Both had been brutally attacked with a fireman's axe. Originally aired as Season 13, Episode 25.

Two suspects living together were linked to a murder by bloodstained boots and a gun, items that belonged to the man who said he'd never met the victim. Investigators hoped the manufacturing code on beer bottles would determine who was telling the truth. Originally aired as Season 13, Episode 26.