1977/Coral Gables, FL: Shortly after a young nurse ends up beaten and shot to death in her apartment, her lover's wife reveals her knowledge about the affair yet it takes nearly 40 years to match DNA evidence found at the crime scene to implicate the man behind it all.

The sporadic appearance of a dozen brutalized mannequins and six different incidents of murder and assault, terrorizes residents of Elkridge, MD, for thirteen years until a DNA match implicates a local suspect as the killer.

A 77 year-old woman is found raped and murdered in her vandalized house in Philadelphia, PA. A wrongfully convicted man is put behind bars for 23 years until DNA analysis emerges implicating the real killer.

When a popular high school cheerleader is abducted and found stabbed to death in a water retention tank, it takes several years until the murderer makes the mistake of implicating himself as a new victim giving the authorities the evidence needed to pin him to the brutal killing.

When a young woman is found murdered in her apartment, it takes over 40 years to find clues in the cold case with new DNA testing to implicate a prominent serial killer as the suspect in the murder.

After a multi-millionaire is shot in his own mansion and eventually succumbs to his wounds, it takes countless years until a family friend implicates the true mastermind behind the deadly plan.

When a recently married woman is found shot to death in a mobile home, her husband claims it was an accident and the case is closed until the death certificate is changed, new interview surface, and autopsy findings uncover the truth behind the gruesome murder.

When a man claims to have found his young wife brutally stabbed to death in their new home, it take 23 years of investigative work and new DNA evidence to uncover the killer is related to the purchase of their starter house.

A young woman's corpse is found in a river and the evidence points to her abusive husband. It takes 30 years until a mysterious woman surfaces explaining how the true killer behind the gruesome murder is actually her own husband.

When the bodies of two college sweethearts are found on the side of a Washington highway, it takes another gruesome murder, one lone fingerprint and four long years of investigating to uncover the murderer is someone already convicted of abduction and rape.

When a prominent lawyer and his respected wife are found shot to death in their own home, investigators piece together an odd scam against closeted homosexuals run by a mafia ring allowing them to discover the reasons and culprits behind the murders

A woman is bludgeoned to death in her bed, 23 years later, a similar murder reveals new DNA evidence that matches the original cold case, implicating a man who lived just a couple blocks away.

After an aspiring model's body is found dismembered in a lake, it takes over a year to find DNA evidence relating back to a dog owned by her abusive husbands' parents, shifting the investigation closer than anyone could have ever imagined.

When two daughters call 911 after finding their father dead on the couch, it takes over 3 years in an awkward love triangle between them to uncover what actually happened in lack of a killer that nearly got away with the "perfect crime."

When a woman is found dead and it's ruled a suicide, it takes a diligent investigator to continually work the case to uncover the truth behind who killed her and the motive for murder being closer than once expected.

When a woman and her nephew are found brutally murdered with an answering machine recording having recorded it all, it takes three years to arrest the murderer and reveal how they're in close contact with the deceased.

When a hitman kills the wrong person, it takes over a year to locate the gun used in the murder-for-hire plot which shockingly links back to an unexpected boss that's closer to the victim than originally suspected.

When a cancer-ridden man is stabbed to death in his own home and later dies, it takes nearly seven years, wiretapping, and extensive surveillance to link the group of conspirators to the horrific murder only to discover the sole purpose of the crime was money.

When a divorced woman married to a verbally abusive husband is found murdered in her bed, all signs point to him until his alibi rules him out, forcing the investigators to hunt for two years until they stumble across the murderer with a shady past that's closer than expected to the victim.

When a young FBI employee is found strangled to death in her own home, all signs point to her abusive ex until her diligent co-workers piece together the clues over several years to reveal the killer is someone very unexpected and has a past of violent behavior.

After a mother has found murdered on a deserted road outside of town, four years go by with investigators linking evidence to an Air Force base where a standardized testing scheme helps link the murderer to the crime.

When a Hollywood cameraman is found shot to death, it takes two years for investigators to piece together the evidence and uncover layer upon layer of hired killings in order to hide the identity of the person behind it all.

When a prominent businessman is killed by a bomb in his car, thirteen years pass until investigators are able to uncover a trail of secret love affairs and financial receipts to lead them to the most unassuming killer.

When a vibrant bisexual woman is found dead, her Craigslist lover points blame at the victim's boyfriend until a tip from a hit television show reveals the true killer, leading to a chase around the world in an attempt to place them behind bars.

After ingested Excedrin pills lead to a string of mysterious deaths around the city, investigators uncover a dubious murder plot behind it all evolving around insurance policies as the killer is finally caught years after the murder.

When a married woman falls for another married man that was contracted to build her house, she's found murdered days before her divorce is finalized, and it takes five long years to discover the killer overseas in an odd love triangle.