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When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan; an interview with the officer who questioned Hinckley after the attempted assassination.

A man uses a dating site to meet and murder a college student.

For Keith Morrison, this case stands out as an unusual mystery; the crime seemed arbitrary with no apparent motive; there was a confession which might have ended the investigation but that was only the beginning.

A loving grandmother from a traveling community is found brutally murdered, shocking all; investigators soon uncover a web of lies, identity theft and millions in insurance fraud that point to who killed this sweet old lady.

A single mother becomes a murder victim while living a double life; a web of deception, sex and murder sends detectives on a multi-year hunt to figure out who could have murdered her.

A man is found dead in the shower, and police have only two suspects, but to figure out who killed him and why, is not as cut and dry as it may seem.

The abduction and murder of a pregnant woman and her fiancé from their Decatur home sends shockwaves throughout Atlanta; ransom calls and voicemails turn into digital breadcrumbs for investigators to track the killers down.

Twin daughters find their mother stabbed to death in their quaint suburban home, and the pressure for detectives to deliver justice is on; but when the shocking truth behind the murder comes out, the Atlanta community is left stunned and heartbroken.

When a beloved Staten Island mother vanishes, NYPD detectives have a gut feeling she didn't run off and have trouble believing she abandoned her family; as they retrace her last known whereabouts, CCTV footage leads them to a horrific discovery.

In the most expensive zip code in Manhattan, an aging, eccentric art collector is found strangled in his apartment.

When the owner of a Brooklyn pizzeria is gunned down in broad daylight in his backyard, the news publishes mafia theories, and the FBI joins the NYPD to investigate.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

Detectives in Washington, D.C., discover a puzzling connection between two women who disappeared two decades apart; an investigation reveals a sinister secret hidden along one of the busiest stretches of interstate in the country.

A woman is found dead, police use blood evidence and computer forensics to convince a jury that the murderer is guilty.

When an elderly woman dies in an apparent robbery-homicide, evidence suggests the suspect broke out of the house rather than breaking in.

Wealthy man is shot dead while his wife is forced to open their hidden safe, but they couldn't be identified because they were wearing ski masks.

The bomb was constructed to cause as much damage as possible, and it did, killing the victim with deadly force and flame; a painstaking search yielded tiny clues, which identified the killer as surely as if he'd signed them.

A twelve-year-old girl claims that she was abducted and sexually assaulted; her story seems unbelievable until police discover fibers on her clothing.

A man calls for help when his wife has a fatal fall down the stairs; numerous amount of bloodstains make police suspicious.

A decade old case reopens, and a few seconds of a 911 call enable investigators to determine who is responsible for a murder.

A flawed envelope is an unlikely clue to identifying a killer who laced a water cooler with cyanide and caused the death of a woman.

A mussel diver and his fiancée are found dead in their burnt home; a tiny clue points to arson and murder.

For ten years, the disappearance of a college co-ed remained a mystery; new scientific testing cast a different light on a man who had been a suspect all along.