HLN HDTV (HLNHD)

The 2004 murder of Summerfield, Fla., resident Debra Rawls is investigated. (Repeat).

The 2005 murder of Edith "Pen" Meyer is discussed. (Repeat).

The murders of Joanne and Alyssa Presti and the investigation that nabbed their killer are discussed. (Repeat).

The 1981 murder of college student Susan Schumake and the investigation that led to her killer's conviction in 2006 are discussed. (Repeat).

The 1999 murder of Troy Temar in Lebanon, Ohio, and the subsequent homicide investigation are discussed. (Repeat).

A union official is executed in his home not long after a strike by the union membership. Neither his wife, who was sleeping in the adjacent bedroom, nor anyone in the neighborhood, heard any gunshots. It would take a forensic sound test, an electron microscope, and a nightgown to explain why. [also marked as S8:E3] (Repeat).

A man tells police he shot an intruder who attacked and murdered his wife. The husband paints a tragic picture of harassment, stalking and revenge, and is dubbed a hero for his valiant attempt to save his wife. Four years later, new forensic evidence leads police to re-examine the motives of this so-called hero. [also marked as S8:E6] (Repeat).

An alleged suicide is investigated. A police officer claims his estranged wife shot herself after they argued. Investigators rely on a ballistics report and other forensic evidence to verify or disprove the husband's story. (Repeat).

The investigation into an apparent murder-suicide leads the police to a different conclusion and to a suspect: a high-school track coach. (Repeat).

The brutal slayings of a young couple are investigated. Shell casings, paint chips and glass shards lead the police to suspect a white supremacist. (Repeat).

With no forensic evidence inside a murder scene, investigators were baffled. But they suspected that the victim's dog, had witnessed the crime. If she had, forensic scientists would've had some way to find out, what the dog had seen. (Repeat).

A young TV news producer is raped and murdered in her apartment. Police identify two suspects, but both are cleared of any wrongdoing. The case stalls for more than a year, and then investigators turn to Virginia's DNA Databank which houses profiles of more than 8,000 convicted felons, and is the first of its kind in the nation. Comparing the crime scene evidence with the Databank profiles results

The police investigate the shooting of a homicide detective's wife; the officer claims his wife shot herself by accident. (Repeat).

For years, a woman suffered from what appeared to be the unpleasant side effects of lithium, a drug prescribed to treat bipolar disorder. Her search for help led her to numerous doctors and hospitals, and resulted in a 4000-page medical file. When she died, investigators had to determine if her death was due to natural causes, suicide, or murder. (Repeat).

A woman is found dead in a ravine near a jogging path. Crucial crime scene evidence had been washed away by severe thunderstorms. Twice, the trail turned cold. Then, almost 20 years later, an old hat and a chip of stainless steel no longer than a fingernail brought the killer to justice. (Repeat).

The investigation into the murder of an 11-year-old girl, who had been missing for 10 days, is recounted. (Repeat).

A sexual-abuse victim's death is investigated. (Repeat).

For six years, a serial killer prowled the streets of New York City. He wrote letters to police and The New York Post, indicating he would kill twelve people, one for each astrological sign. Forensic astronomy, handwriting analysis, and DNA extracted from the flap of an envelope gave investigators a profile of the killer, and a stroke of luck enabled them to find him. (Repeat).

A possible suicide is investigated. (Repeat).

A union official is executed in his home not long after a strike by the union membership. Neither his wife, who was sleeping in the adjacent bedroom, nor anyone in the neighborhood, heard any gunshots. It would take a forensic sound test, an electron microscope, and a nightgown to explain why. [also marked as S8:E3] (Repeat).

A man tells police he shot an intruder who attacked and murdered his wife. The husband paints a tragic picture of harassment, stalking and revenge, and is dubbed a hero for his valiant attempt to save his wife. Four years later, new forensic evidence leads police to re-examine the motives of this so-called hero. [also marked as S8:E6] (Repeat).

An alleged suicide is investigated. A police officer claims his estranged wife shot herself after they argued. Investigators rely on a ballistics report and other forensic evidence to verify or disprove the husband's story. (Repeat).

The investigation into an apparent murder-suicide leads the police to a different conclusion and to a suspect: a high-school track coach. (Repeat).

The brutal slayings of a young couple are investigated. Shell casings, paint chips and glass shards lead the police to suspect a white supremacist. (Repeat).

With no forensic evidence inside a murder scene, investigators were baffled. But they suspected that the victim's dog, had witnessed the crime. If she had, forensic scientists would've had some way to find out, what the dog had seen. (Repeat).

A young TV news producer is raped and murdered in her apartment. Police identify two suspects, but both are cleared of any wrongdoing. The case stalls for more than a year, and then investigators turn to Virginia's DNA Databank which houses profiles of more than 8,000 convicted felons, and is the first of its kind in the nation. Comparing the crime scene evidence with the Databank profiles results

The police investigate the shooting of a homicide detective's wife; the officer claims his wife shot herself by accident. (Repeat).

For years, a woman suffered from what appeared to be the unpleasant side effects of lithium, a drug prescribed to treat bipolar disorder. Her search for help led her to numerous doctors and hospitals, and resulted in a 4000-page medical file. When she died, investigators had to determine if her death was due to natural causes, suicide, or murder. (Repeat).

A woman is found dead in a ravine near a jogging path. Crucial crime scene evidence had been washed away by severe thunderstorms. Twice, the trail turned cold. Then, almost 20 years later, an old hat and a chip of stainless steel no longer than a fingernail brought the killer to justice. (Repeat).

The investigation into the murder of an 11-year-old girl, who had been missing for 10 days, is recounted. (Repeat).

A sexual-abuse victim's death is investigated. (Repeat).

For six years, a serial killer prowled the streets of New York City. He wrote letters to police and The New York Post, indicating he would kill twelve people, one for each astrological sign. Forensic astronomy, handwriting analysis, and DNA extracted from the flap of an envelope gave investigators a profile of the killer, and a stroke of luck enabled them to find him. (Repeat).

A possible suicide is investigated. (Repeat).

California police are baffled when an innocent man's DNA is found at the scene of a deadly home invasion. Authorities team with the man's defense attorney. (Repeat).

A young mother is found murdered in her home. From the onset, there are two suspects with ample motive, but there is an unusual interview and security camera footage. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Shocking lies, deceit and bad behavior—all caught on camera. Criminal cases are full of terrifying 911 calls, police interrogations, jail house recordings, body camera and surveillance video. (Repeat).

Shocking lies, deceit and bad behavior, all caught on camera. Criminal cases are full of terrifying 911 calls, police interrogations, jail house recordings, body camera and surveillance video. (Repeat).

Shayna Hubers and Ryan Poston seemed like a match made in heaven, until he ends up dead in a pool of blood, shot in the face. Stunning interrogation tapes leave cops in disbelief and lead investigators to a surprising motive. (Repeat).

Prominent realtor Todd Kohlhepp's double life is exposed when police launch a dramatic rescue of a young woman chained like a dog inside a shipping container on his property. (Repeat).

Eight-year-old Cherish Perrywinkle is lured out of a Walmart by a registered sex offender, but that's just the beginning of a night of terror, all caught on camera. (Repeat).

A fitness instructor was killed while preparing for a morning workout class at a church. Fortunately, CCTV around the area has caught her killer. (Repeat).

A dormant investigation into a young woman's murder is reopened. The police rely on a diary, a child's memory and a forensic psychologist to break the case. (Repeat).

The investigation into the apparent suicide of a retired police officer takes an unexpected turn when the medical examiner rules the death a homicide. (Repeat).

Experts use forensic science to solve mysterious crimes. They analyze evidence like fingerprints and DNA to uncover the truth and bring justice. (Repeat).

Two different men called police to report the same murder of a young woman. When the case's other anomalies stall the police, a few tiny seeds and a discarded candy wrapper help expose the killer. [also marked as S8:E20] (Repeat).

A mysterious death in Mexico is investigated by the victim's insurance company. (Repeat).

The police investigate a pipe-bomb incident that took the life of a young man and injured his mother. (Repeat).

A mysterious murder is investigated; and law-enforcement officers race against time to catch the suspect before he flees across state lines. (Repeat).

A young couple decided to celebrate their first wedding anniversary with a camping trip to Mount Hood. During the trip, the husband was shot and killed, and his wife told two different versions of the events which led to his death. Forensic psychiatry finally enabled her to distinguish fact from fiction, and the evidence from ballistics tests allowed investigators to determine what really happened

A double shooting at a boathouse is investigated. A forensic geologist uses soil samples to connect a suspect to the location, and cell-phone calls and shell casings further the evidence against the suspect. (Repeat).

The hit-and-run death of a woman seems to be an open-and-shut case once the police hone in on the victim's boyfriend. However, a serial murderer's confession changes that. (Repeat).

A high school gym teacher gives his friend a ride home but never returns; his wife and friend received letters saying he started a new life, but they suspect foul play despite no body being discovered. A closer forensic look at those letters, and a microscopic piece of tissue, gave investigators an entirely different explanation for where he went and why. [also marked as S8:E27] (Repeat).

An audiotape of a murder is analyzed to determine if it occurred in self-defense, as the suspect claims, or was a premeditated event. (Repeat).

A computer database crash at a manufacturing company is investigated. (Repeat).

Investigators try to determine what caused a 1983 crash involving Secret Service agents for England's Queen Elizabeth II and a police officer near Yosemite National Park. (Repeat).

A dormant investigation into a young woman's murder is reopened. The police rely on a diary, a child's memory and a forensic psychologist to break the case. (Repeat).

The investigation into the apparent suicide of a retired police officer takes an unexpected turn when the medical examiner rules the death a homicide. (Repeat).

Experts use forensic science to solve mysterious crimes. They analyze evidence like fingerprints and DNA to uncover the truth and bring justice. (Repeat).

Two different men called police to report the same murder of a young woman. When the case's other anomalies stall the police, a few tiny seeds and a discarded candy wrapper help expose the killer. [also marked as S8:E20] (Repeat).

A mysterious death in Mexico is investigated by the victim's insurance company. (Repeat).

The police investigate a pipe-bomb incident that took the life of a young man and injured his mother. (Repeat).

A mysterious murder is investigated; and law-enforcement officers race against time to catch the suspect before he flees across state lines. (Repeat).

A young couple decided to celebrate their first wedding anniversary with a camping trip to Mount Hood. During the trip, the husband was shot and killed, and his wife told two different versions of the events which led to his death. Forensic psychiatry finally enabled her to distinguish fact from fiction, and the evidence from ballistics tests allowed investigators to determine what really happened

A double shooting at a boathouse is investigated. A forensic geologist uses soil samples to connect a suspect to the location, and cell-phone calls and shell casings further the evidence against the suspect. (Repeat).

The hit-and-run death of a woman seems to be an open-and-shut case once the police hone in on the victim's boyfriend. However, a serial murderer's confession changes that. (Repeat).

A high school gym teacher gives his friend a ride home but never returns; his wife and friend received letters saying he started a new life, but they suspect foul play despite no body being discovered. A closer forensic look at those letters, and a microscopic piece of tissue, gave investigators an entirely different explanation for where he went and why. [also marked as S8:E27] (Repeat).

An audiotape of a murder is analyzed to determine if it occurred in self-defense, as the suspect claims, or was a premeditated event. (Repeat).

A computer database crash at a manufacturing company is investigated. (Repeat).

Investigators try to determine what caused a 1983 crash involving Secret Service agents for England's Queen Elizabeth II and a police officer near Yosemite National Park. (Repeat).

A fire leads investigators to re-examine an unusual death. (Repeat).

A young woman's naked body is discovered in a remote area leading forensic investigators on a search for clues to her identity and the identity of her killer. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

Get the latest news, weather updates, and sports analysis on CNN News Central. Stay informed with all the top stories of the day. (Repeat).

On April 19, 1995, Timothy McVeigh, a 26-year-old U.S. army veteran, detonates a truck bomb outside the Alfred Murrah Federal Building in downtown Oklahoma City, claiming the lives of 168 innocent people. (Repeat).

An exclusive prison interview with Timothy McVeigh. He describes how events in his personal life, and in the ever-changing world around him, inspired him to take action against his fellow Americans. Also: survivors of the bombing. (Repeat).

From 1979 to 1981, more than two dozen of Atlanta's black children disappeared without a trace. (Repeat).

Investigators believe Wayne Williams murdered more than two dozen black children and young men in Atlanta. The 40 year-old evidence is reexamined using modern forensics in search of more answers. (Repeat).

In 1999, young women mysteriously disappeared from Yosemite National Park. Investigators determined foul play and a prime suspect emerges, then escapes. (Repeat).

The key suspect in the murder of young women in Yosemite National Park is caught, but it's up to an exceptionally skilled FBI agent to dismantle his web of lies and denials to draw a confession. (Repeat).

In 1993, Amtrak experienced the deadliest train crash in U.S. history. The clues to the cause of the crash lay etched in twisted steel. (Repeat).

A London fire that killed 31 people is investigated. (Repeat).

The 1986 investigation into the murder of 20-year-old Seattle resident Carrie Love is spotlighted. After her body was found on the roadside, the police honed in on a suspect---but his alibi appeared solid. By studying tire tracks found at the scene, however, investigators were able to nab the culprit. (Repeat).

The shooting death of woman who was killed while walking in the woods is investigated. (Repeat).

The police investigate the death of a woman in Alaska whose body was found by a roadside. Although a murder weapon is recovered, scant evidence leaves investigators stumped. (Repeat).

A woman disappears without a trace; even though foul play is suspected, the leads don't pan out and the trail turns cold. Twenty years would pass before police are able to link a clump of hair discovered in an isolated area with the missing woman. Members of "NecroSearch," a group of volunteer forensic scientists, searched a remote area of Colorado a meter at a time, found the victim's body, and g