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An 8-year-old girl discovers her mother brutally bludgeoned to death in her home after her mom's shift at a Vegas casino. Police turn to surveillance video in the hope it will reveal the killers. (Repeat).

A killer stabs Jeff Wright 193 times and buries him in the backyard of his own home. (Repeat).

A desperate wife dials 911 to report a robbery after finding her husband, a father of three, shot in bed. Evidence at the scene quickly leads investigators to the killer. (Repeat).

The brutal and public stabbing of a young high school teen shocks the community. Police quickly unravel the crime and motive through evidence of threatening voicemails and a long-simmering rivalry. (Repeat).

The 1987 disappearance of Tracy Jo Shine, a Houston resident, is recalled. The investigation led to a dead end until 2000, when a "cold case squad" learned that the woman's boyfriend had bragged about killing her. (Repeat).

The story of Phillip Rouss is related. In 1997, the 60-year-old Tennessee resident seemed to be dying and doctors couldn't pinpoint why. In time, however, Rouss came to believe that his partner in a car restoration business might be poisoning him and took his suspicions to the police. (Repeat).

The disappearance of a little girl is detailed. Although her father confessed to murdering her, the police soon poked holes in his story, leaving the case unsolved for 14 years. (Repeat).

The investigation into a 48-year-old woman's murder in Anchorage is helped by a law that requires bars to have video cameras installed on the premises. (Repeat).

A look at the case against Jack Reeves. In 1994, friends reported his mail-order bride Emelita Villa had disappeared. The police centered its suspicions on Reeves and, while pursuing leads, uncovered information linking him to the deaths of two former wives. (Repeat).

The murders of an elderly couple leave investigators stumped until, two years later, they receive a major break. A jeweler looking through old newspaper clippings recognizes a necklace the female victim wore as having been pawned in her own shop. (Repeat).

The murder of a 9-year-old girl is investigated. Investigators use a garbage bag to connect a suspect to the crime. (Repeat).

A clue found at the site of a stewardess's murder leads investigators astray until forensic evidence sets them straight. (Repeat).

Explore real-life cases solved through forensic science. Watch as experts uncover clues using advanced techniques to bring criminals to justice. (Repeat).

On March 13, 1981, 86-year-old Enid Whittlesey is found murdered in her Los Angeles home. The suspect eludes arrest for 16 years but that changes; however, when investigators learn the culprit is left-handed, putting a new spin on old facts. [also marked as S7:E39] (Repeat).

A 1993 train crash on Alabama's Bayou Canot bridge is investigated. (Repeat).

More than 75 Seattle-area arsons are probed. (Repeat).

The use of the computers by law enforcement is detailed in this look at a series of crimes in St. Louis that stumped the local police and the FBI. (also marked as S7:E44) (Repeat).

Using an anonymous letter and geographic profiling, investigators in Philadelphia close in on a serial rapist who attacks victims who live on upper floors of apartment buildings. When they hear of similar cases in Colorado, a cleverly obtained DNA sample confirms their suspicions. [also marked as S7:E18] (Repeat).

A family links its ill health to an uninvited "guest" in their brand-new home. (Repeat).

A murder investigation in St. Petersburg, Fla., crosses jurisdictions from New York and Jamaica. The police rely on cell phone mapping, wiretapping and a host of forensic evidence to link a suspect to a murder. (Repeat).

The disappearance of a little girl is detailed. Although her father confessed to murdering her, the police soon poked holes in his story, leaving the case unsolved for 14 years. (Repeat).

The investigation into a 48-year-old woman's murder in Anchorage is helped by a law that requires bars to have video cameras installed on the premises. (Repeat).

A look at the case against Jack Reeves. In 1994, friends reported his mail-order bride Emelita Villa had disappeared. The police centered its suspicions on Reeves and, while pursuing leads, uncovered information linking him to the deaths of two former wives. (Repeat).

The murders of an elderly couple leave investigators stumped until, two years later, they receive a major break. A jeweler looking through old newspaper clippings recognizes a necklace the female victim wore as having been pawned in her own shop. (Repeat).

The murder of a 9-year-old girl is investigated. Investigators use a garbage bag to connect a suspect to the crime. (Repeat).

A clue found at the site of a stewardess's murder leads investigators astray until forensic evidence sets them straight. (Repeat).

Explore real-life cases solved through forensic science. Watch as experts uncover clues using advanced techniques to bring criminals to justice. (Repeat).

On March 13, 1981, 86-year-old Enid Whittlesey is found murdered in her Los Angeles home. The suspect eludes arrest for 16 years but that changes; however, when investigators learn the culprit is left-handed, putting a new spin on old facts. [also marked as S7:E39] (Repeat).

A 1993 train crash on Alabama's Bayou Canot bridge is investigated. (Repeat).

More than 75 Seattle-area arsons are probed. (Repeat).

The use of the computers by law enforcement is detailed in this look at a series of crimes in St. Louis that stumped the local police and the FBI. (also marked as S7:E44) (Repeat).

Using an anonymous letter and geographic profiling, investigators in Philadelphia close in on a serial rapist who attacks victims who live on upper floors of apartment buildings. When they hear of similar cases in Colorado, a cleverly obtained DNA sample confirms their suspicions. [also marked as S7:E18] (Repeat).

A family links its ill health to an uninvited "guest" in their brand-new home. (Repeat).

A murder investigation in St. Petersburg, Fla., crosses jurisdictions from New York and Jamaica. The police rely on cell phone mapping, wiretapping and a host of forensic evidence to link a suspect to a murder. (Repeat).

A young Colorado mother suddenly vanishes on Thanksgiving Day. When police trace her cell phone, it leads them to a surprising character with an even more surprising story. (Repeat).

Eight days after she had disappeared, an 18-year-old woman's partially nude body is found floating in a river in Wyoming. Years later, DNA technology uncovers dark secrets that led to her demise. (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).

The DeFeo famamily is found murdered inside their home in Amityville. (Repeat).

Psychics and para psychologists head to house in Amityville to investigate what happened there. (Repeat).

Revisiting the twisted lives of some of the most frightening, diabolical characters in recent history. The stories trace the heinous, criminal acts of these elusive miscreants and the eventual road to justice. (Repeat).

Rodney Alcala appears on a TV show where he wins a date. However, the girl rejected him, triggering another rampage of serial killings. (Repeat).

Richard Kuklinski holds a dark secret: he was the "Iceman." (Repeat).

The investigators are after Iceman - Richard Kuklinski. (Repeat).

A woman convicted of killing her mother in a car fire is granted a new trial. An expert fire witness shares an opinion on how the fire ignited that differs from the prosecution's theory and, if verified, would clear the daughter of any culpability. (Repeat).

Police close in on the kidnapper of teenage girls, who tells them where he dumps the bodies. (Repeat).

In 1991, Massachusetts resident Richard Alfredo died of an apparent heart attack. No one thought foul play until police looked into the odd behavior of his girlfriend Christina Martin in the days before his death. Controversy surrounded the case for almost a decade, pitting competing teams of toxicologists against each other -- one claiming natural death and the other saying it was cold-blooded mu

The case of a woman found dead in her home leaves investigators stumped. (Repeat).

The investigation into the abduction and murder of a teen girl is detailed. The police believed they had caught the killer, but he was freed on a technicality. Investigators were able to nab the culprit 24 years later because of a stored vacuum-cleaner bag that contained microscopic paint particles. (Repeat).

The search for an abducted woman leads investigators to a rental car, but the signature on the rental paperwork is a forgery. Forensic science is used to identify the signature despite the killer's attempts to falsify it. (Repeat).

A woman is murdered two days before testifying against a man who allegedly assaulted her. The suspect seems to have an air-tight alibi: a time-stamped videotape that indicates he was fishing at the time of the murder. (Repeat).

Attacks on Florida tourists are investigated. (Repeat).

Relating the case of Ray Krone, dubbed the "Snaggletooth Killer" by the Arizona media. He was wrongly convicted in the 1991 murder of a Phoenix bar employee, not once, but twice. After serving 10 years in prison, DNA testing proved him innocent; and enabled authorities to locate the actual killer, who confessed to the crime. (Repeat).

A death in Pennsylvania leads to a homicide investigation in North Carolina after similarities between the cases emerge. (Repeat).

An unexpected murder plot is uncovered when a woman's flu-like symptoms worsen. (Repeat).

A pregnant woman's murder is investigated. The police find an unlikely source of information for the case: an HBO movie. (Repeat).

A murder in Peoria, Ill., is investigated. An obscure clue leads to the killer. (Repeat).

The murder of a businessman leaves the investigators stumped; the prime suspect's alibi is questioned. (Repeat).

A woman convicted of killing her mother in a car fire is granted a new trial. An expert fire witness shares an opinion on how the fire ignited that differs from the prosecution's theory and, if verified, would clear the daughter of any culpability. (Repeat).

Police close in on the kidnapper of teenage girls, who tells them where he dumps the bodies. (Repeat).

In 1991, Massachusetts resident Richard Alfredo died of an apparent heart attack. No one thought foul play until police looked into the odd behavior of his girlfriend Christina Martin in the days before his death. Controversy surrounded the case for almost a decade, pitting competing teams of toxicologists against each other -- one claiming natural death and the other saying it was cold-blooded mu

The case of a woman found dead in her home leaves investigators stumped. (Repeat).

The investigation into the abduction and murder of a teen girl is detailed. The police believed they had caught the killer, but he was freed on a technicality. Investigators were able to nab the culprit 24 years later because of a stored vacuum-cleaner bag that contained microscopic paint particles. (Repeat).

The search for an abducted woman leads investigators to a rental car, but the signature on the rental paperwork is a forgery. Forensic science is used to identify the signature despite the killer's attempts to falsify it. (Repeat).

A woman is murdered two days before testifying against a man who allegedly assaulted her. The suspect seems to have an air-tight alibi: a time-stamped videotape that indicates he was fishing at the time of the murder. (Repeat).

Attacks on Florida tourists are investigated. (Repeat).

Relating the case of Ray Krone, dubbed the "Snaggletooth Killer" by the Arizona media. He was wrongly convicted in the 1991 murder of a Phoenix bar employee, not once, but twice. After serving 10 years in prison, DNA testing proved him innocent; and enabled authorities to locate the actual killer, who confessed to the crime. (Repeat).

A death in Pennsylvania leads to a homicide investigation in North Carolina after similarities between the cases emerge. (Repeat).

An unexpected murder plot is uncovered when a woman's flu-like symptoms worsen. (Repeat).

A pregnant woman's murder is investigated. The police find an unlikely source of information for the case: an HBO movie. (Repeat).

A murder in Peoria, Ill., is investigated. An obscure clue leads to the killer. (Repeat).

The murder of a businessman leaves the investigators stumped; the prime suspect's alibi is questioned. (Repeat).

A surveillance video might shed some light on to what happened in an apparel store in Bethesda before it was turned into a bloody scene. (Repeat).

The 20-year-old clerk of an Atlanta-area smoke shop is gunned down during a robbery, but investigators have only descriptions of the killers and the make of their getaway car. Investigators use a videotaped confession to smoke out the killers. (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).

An examination of the 2002 murder of Navasota, Texas, funeral-home owner Lonnie Turner Sr. includes a look at efforts to solve the case. (Repeat).

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).