S1.E1 ∙ Pentola-Clark

It took nearly 40 years to match DNA evidence found at the crime scene to implicate the man man behind the murder of a young nurse.

S1.E2 ∙ Gouldin

The sporadic appearance of a dozen brutalized mannequins and six different incidents of murder and assault, terrorizes residents of Elkridge, a small town in Maryland. It is 13 years until a DNA match implicates a local suspect as the killer.

S1.E3 ∙ Talley

In 1991, a 77 year-old woman, Louise Talley, is found raped and murdered in her vandalized Nicetown neighborhood home in Philadelphia, Pennsylvania. A man, Anthony Wright, is convicted and put behind bars. 23 years later, DNA analysis emerges implicating the real killer and clearing Wright.

S1.E4 ∙ Hoffman/O'Brien

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.

S1.E5 ∙ Hlavka

A young woman, Anna Hlavka, is found sexually assaulted and strangled in her bedroom after she was last seen outside her apartment after work. Police canvass the neighborhood and interrogate multiple suspects, but the case goes cold when leads go nowhere. Finally, nearly 40 years post-murder, a DNA match is found and someone is implicated as the woman's murderer.

S1.E6 ∙ Beard

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

S1.E7 ∙ Anderson

When a recently married woman, Carmina Anderson, is found shot to death in a camper, her husband claims it was an accident and the case is closed. 21 years later a dedicated daughter, new shocking interviews and autopsy findings uncover the true killer behind the gruesome murder.

S1.E8 ∙ Flagg

When a man claims to have found his young wife brutally stabbed to death in their new home, the police are left with no leads. It will take 23 years of investigative work and new DNA evidence to uncover the killer is related to the purchase of their starter house.

S1.E9 ∙ Harris

A young woman's corpse is found in a river, with evidence pointing to her abusive husband. Decades later, another woman reveals the true killer is her own spouse

S1.E10 ∙ Smith/Lavigne

Two college sweethearts are found murdered on a Washington highway. After years of investigation involving another murder and a fingerprint, the culprit is revealed to be a convicted abductor and rapist.

S1.E11 ∙ Sherry

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.

S1.E12 ∙ Baker

When a woman is found brutally bludgeoned to death in her bed, her estranged husband is suspected. 23 years later when a similar murder reveals new DNA evidence that matches the original cold case, a man who lived a few blocks away is implicated.

S1.E13 ∙ Slover

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

S1.E14 ∙ Tomaselli

When two daughters call 911 after finding their father, Anthony Tomaselli, dead on his couch, it takes over three years and an awkward love-triangle between them to uncover what actually happened and lock up a killer that nearly got away with the "perfect crime".

S1.E15 ∙ Shelly

A woman is found shot on her bathroom floor. Her boyfriend claims it is a suicide and the autopsy results come back showing the wounds as self-inflicted. But inconsistencies, like the fact that the victim had just packed up her car to take her kids to Arkansas, keep one investigator returning to the case. A break finally comes more then 10 years later, contradicting the story of events and reveal deception, uncovering the truth behind who killed her and the motive for murder being closer than once expected.

S1.E16 ∙ Steller/King

A woman and her live-in nephew are found brutally murdered on the floor of their kitchen in the small town of Middletown, Conneticut. When an answering machine recording of the murder is found, it takes 3 year to implicate the killer and convict a double murder.

S1.E19 ∙ Rasmussen

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.

S1.E23 ∙ Triano

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

S1.E25 ∙ Nickell/Snow

When ingested Excedrin pills are found to have lead to several mysterious deaths around the city, investigators uncover a dubious murder plot. Revolving around insurance policies and uncovering a shocking truth, the killer is finally caught years after.

S2.E1 ∙ Algeri

When a hit-man kills the wrong person, it takes over a year to locate the gun used in the murder-for-hire plot which uncovers a shocking scandal that links back to an unexpected someone that's closer to the victim than originally suspected.

S2.E2 ∙ Barsock

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

S2.E3 ∙ Gailiunas

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 odd love triangle and a killer hiding overseas.

S2.E4 ∙ Jessee

When a cancer-ridden man, Jack Jesse, is stabbed 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 for money.

S2.E5 ∙ Lipscomb

A mother is found murdered on a deserted road outside of town near San Antonio, Texas. Four years go by with investigators linking evidence to an nearby air force base where a standardized testing scheme helps link the murderer to the crime.

S2.E6 ∙ Mooney

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 behaviour.

S2.E7 ∙ Samuels/Bernstein

When a Hollywood cameraman is found shot to death, there is very little evidence to point investigators in the right direction and eventually the case goes cold. 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.

S3.E1 ∙ Greaves

S3.E2 ∙ Rainsford

S3.E3 ∙ Kumeta

S3.E4 ∙ Better

S3.E5 ∙ Hardy

S3.E6 ∙ Plasse

S3.E7 ∙ Pool

S3.E8 ∙ Strube

S3.E9 ∙ Loofe

S3.E10 ∙ Smith

S3.E11 ∙ Farver

S3.E12 ∙ Anthony

S3.E13 ∙ Koenig

S3.E14 ∙ Stern

S3.E15 ∙ Petito

S4.E1 ∙ Ford

S4.E2 ∙ Tokes

S4.E3 ∙ Oxley

S4.E4 ∙ Johnson

S4.E5 ∙ Zhang

S4.E6 ∙ Andrade

S4.E7 ∙ Guitron

S4.E8 ∙ Siani

S4.E9 ∙ Poltorak

S4.E10 ∙ Corbin

S4.E11 ∙ Bragg

S4.E12 ∙ Ducsay

S4.E13 ∙ Colvin

S4.E14 ∙ Melnyczok

S4.E15 ∙ Ibarra