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DNA evidence helps crack a cold case involving a murdered Arizona woman. (Repeat).

A crime committed against a 10-year-old boy is investigated. (Repeat).

A millionaire in Baton Rouge is found murdered inside his home. (Repeat).

A murder in Lanett, Ala., is investigated. (Repeat).

Examining a case involving the 1996 murder of a 13-year-old girl from Texas City, Texas. (Repeat).

A 1992 murder in Wantage, N.J., is investigated. (Repeat).

The disappearance of a 23-year-old woman stumps investigators for three years until they receive a tip: reports of a man who has kept a refrigerated truck running constantly. (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).

Investigators are flummoxed after a middle-aged woman is found dead in her home. The ex-wife of her husband could hold the key. (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).

The disappearance of a 23-year-old woman stumps investigators for three years until they receive a tip: reports of a man who has kept a refrigerated truck running constantly. (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).

Investigators are flummoxed after a middle-aged woman is found dead in her home. The ex-wife of her husband could hold the key. (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).

A young Texas teenager and her boyfriend are brutally attacked on Valentine's Day; she is found dead while her boyfriend escapes. The case goes cold for nearly 50 years before a new forensic test exposes a family man with a dark secret. (Repeat).

Three Indiana construction workers are found shot on a work site. Detectives find few suspects, but have one clue: one of the killers stepped in dog feces during the murders, If detectives can find his shoes, they've got their man. (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).

Investigating the murder of a single mom in Manchester, N.H. (Repeat).

A woman and her two daughters are murdered in Middletown, Pa., on Christmas Eve. (Repeat).

Investigating a murder in Bensalem, Pa. (Repeat).

A 28-year-old nurse is killed in Joliet, Ill. (Repeat).

Investigating the death of a tourist in Nags Head, N.C. (Repeat).

A cold case involving the disappearance of a 13-year-old paperboy is reopened due to new evidence. (Repeat).

A single mother from upstate New York vanishes mysteriously. (Repeat).

A 19-year-old college student is found strangled in her apartment. (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 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).

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 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).

A Texas ex-con resolves to live a clean life after his release from prison. When he's later arrested and convicted for a bloody murder, he insists he's innocent. From behind bars, he's determined to use forensic science to prove his case. (Repeat).

An extremely successful California career woman keeps falling ill and doctors can't determine why. When she dies, they still have no explanation, until they find a key figure in her life has been lying about his past. (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 January 26th, 2020, Kobe Bryant's helicopter crashed, killing all people on board. (Repeat).

On January 26th, 2020, Kobe Bryant's helicopter crashed, killing all 9 people on board, including his daughter Gigi. The crash left the world searching for answers. Examining how could a simple flight, piloted by an industry pro, go so terribly wrong. (Repeat).

On February 21, 2001, a beautiful young woman is viciously murdered inside her Hollywood home just before she was scheduled to go on a date with actor Ashton Kutcher. As detectives search for answers, her friends relay stories about a strange air conditioning repairman who would show up uninvited at her home. They only know him as Mike, but as the investigation unfolds, police discover that his fu

Forty-one-year-old Adrienne Shelly was a filmmaker and mother. She just finished her film "Waitress" when found hanging from a shower curtain rod. Initially, authorities believed her death to be a suicide, but learned nothing was what it seemed. (Repeat).

In the late hours of night, a man lays fast asleep on his bed. A woman looms over his prone body with a kitchen knife. And just like that, she slices off his manhood. It is a stunning end to the broken marriage of Lorena and John Bobbitt. (Repeat).

An examination of why Erik and Lyle Menendez may have murdered their wealthy parents in 1989. (Repeat).

In a televised trial, Erik and Lyle Menendez were found guilty of murdering their parents. A shocking motive was behind the brothers' actions. (Repeat).

An examination of the secret struggles Prince faced, from his early years to the final days leading up to his shocking death. (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).