An Unexpected Killer - Episode Guide

A selfless couple, Robert and Kathryn Swartz, were found brutally murdered on the first snowy morning of January 1984. As investigators arrived at the scene of the crime, they struggled to find the true motive on why this religious couple who were deeply devoted to their family and charitable causes were killed. But as they dug deeper into the case, investigators uncovered dark family secrets ultimately leading them to a suspect no one saw coming.

When a popular college student is found slain in the middle of campus, police suspect his friends and lovers might be involved.

When a suburban mom is murdered in her own home, investigators chase down an elusive killer that no one saw coming.

Police in small town Louisiana investigate the mysterious and brutal murder of a beloved neighbor with no known enemies.

When a trusting, young college student is viciously murdered and her apartment set ablaze, police untangle a web of relationships to find a killer who's dangerously close to home.

A beloved couple and their special needs son are savagely murdered in rural New Mexico, leading detectives to uncover long buried secrets in a tight-knit town.

When a devoted mother about to embark on a new life is murdered in her own home, detectives follow the evidence through a tangled web of relationships to unmask a killer no one could have predicted.

When a loving father and beloved basketball coach is ruthlessly murdered in Tennessee, police decode a confusing array of evidence to unveil a killer who is shockingly close to home.

A successful TV producer and mother of one is found shot dead in her upscale home. Suspicion falls on her soon-to-be-ex-husband, but his airtight alibi leads detectives to question other potential suspects. Just when the tenacious detectives believe they have a break in the case, they're faced with a shocking and unforeseen surprise in a truly twisted investigation.  

A wealthy businessman and his closest friend are found shot execution style, leaving police with little to go on until a surprising development leads investigators to a killer no one ever suspected.

When a brilliant scientist and devoted family man is found beaten to death, the evidence leads police to make arrests, but an astounding revelation turns the investigation on its head.

When police find the body of a popular taxi driver stuffed inside the trunk of his own car submerged in a river, they struggle to find suspects until the truth reveals a terrible plot to get revenge.

A loving, single mother of two is the victim of a bizarre murder, leading detectives to investigate a number of suspects, until a killer with a dark obsession hiding in plain sight is revealed.

When a recently divorced mother is found strangled to death on her couch, several suspects emerge until the killer is revealed to be someone close to home.

A recently retired woman is found murdered, and detectives struggle with a lack of evidence and try to track down a long list of suspects.

A hard-working young woman is discovered stabbed at the side of a road, leading police on a tireless investigation for 10 years to unveil a killer hiding in plain sight. 

After a 35-year-old analyst for the NSA is fatally stabbed, police look at a number of suspects. As detectives close in on the killer, the investigation takes a shocking turn.

When a 98-year-old widow is found dead in her entryway closet, a chilling discovery leads investigators to a killer in the community who harbors a dark secret.

A beloved resident of a tight-knit Nebraska town is murdered, leading detectives to look at a wide range of suspects before the trail leads to a killer who lives among them.

After a respected educator and mother of two is found dead in small-town Alabama, the investigation focuses on fraught family relationships, but the discovery of a dark secret unveils a killer no one saw coming.

A civic minded teen is shot to death in his own bed, but just as investigators are closing in on those responsible, a jaw dropping twist leaves everyone stunned.

A divorced mother of three is savagely stabbed to death while recovering from major surgery, but police are frustrated by a lack of evidence. After turning cold, the case is reignited by a startling admission that finally leads police to the killer.

When a young woman who was just starting out in life is found assaulted and stabbed to death in her boyfriend's home, detectives work tirelessly to uncover a killer who had previously been above suspicion, leaving the town and police force stunned.

Police hunting the killer of a beloved grandfather believe his missing truck holds the key to the case. After hunting down suspect after suspect, local PD found a killer close to home, wielding a shocking kill weapon in a story of sickening betrayal.

A beautiful young woman is killed in her own bedroom and the evidence appears to point a clear suspect, but police soon discover not everything is as it seems. It takes 30 years and stunning new evidence to reveal a killer hiding in plain sight.

A glamorous 85-year-old millionaire is found stabbed in her basement, sending police on an international investigation that unearths devilish secrets, double lives and a killer no one saw coming whose tricks wouldn't stop even after their arrest.

When a beloved elderly woman is viciously murdered, detectives discover a chilling connection to another unsolved murder. The trail points to someone from her past and investigators race to hunt the killer down before they can strike again.

After the burned body of a beautiful young nursing student is discovered near a rural road, detectives investigate several suspects until the trail of evidence unearths a disturbing and predatory plot.

When an athletic and popular college student is violently murdered in her apartment, police track down several surprising suspects, including one with a disturbing obsession, before crucial evidence unmasks a dangerous predator no one saw coming.

A fun-loving 59-year-old man is found shot to death in his home and his beloved jewelry collection has been stolen, leading detectives to a long list of suspects and a killer harboring a dark secret.

A restaurant is robbed and the night manager murdered, leading police to investigate suspicious co-workers, a disgruntled ex-employee and a violent serial attacker.

When a young husband-to-be is found shot and stabbed, detectives investigate a secret affair, a kidnapping plot and a terrifying racist gang before unveiling a killer whose hidden criminal life leaves everyone stunned.

A devoted mother is stabbed to death in a horrifying attack and suspicion falls on those closest to her, but while a cryptic note and a violent crime spree baffle detectives at first, they eventually track down a deranged killer no one predicted.

A vibrant young mother of three is murdered in the safety of her own home and investigators look to a history of troubled romances, but when the case goes cold and police can't find the killer, a phone call leads to a culprit hiding in plain sight.

A brutal assassination, bitter custody dispute and a gunman's cryptic words send police scrambling on an interstate hunt to find the killer of a beloved father and husband, revealing a hair-raising plot more sinister than anyone suspected.

When the strangling death of a young mother and bride-to-be baffles police, detectives probe a workplace grievance in search of a killer, before a cherished possession provides a link to the crime and cracks the case wide open.

A wealthy trader and father of four is gunned-down at home while his family is tied up in a closet. Police dig into affairs, mob links and a missing coworker, until a chilling new lead and a taped phone call reveal a shocking plot decades later.

When a young mother is found dead in a field after a night out, police scour security video to retrace a suspect's steps. The discovery of a second crime scene leads to an arrest, before hi-tech forensics reveal a truth no one expected.

A cat-loving, recently divorced young woman dipping her toes back in the dating game is beaten and strangled in a brutal and unusual way. Investigators dive into the murky world of online dating to hunt a killer who could be ready to strike again.

Detectives discover the badly beaten body of a single young woman left bizarrely staged on her bed. Fear in the community grows amid a rash of nearby murders. Police are handed a break when a fresh look at old evidence points to the killer.

A beloved teacher and mother of four silently vanishes in the middle of the night. A blood-soaked bedroom and horrific lakeside discovery point police to a killer close to home until mysterious tracks in the mud lead to a culprit no one suspected.

When a loving father of two is gunned down on his driveway, police uncover a hidden affair and workplace grudges before a nervous witness and chilling confession reveal a vicious vendetta from a killer no one expected.

When a family that runs a beloved vet clinic is gunned down, police investigate disgruntled tenants, a pet owner with an ax to grind and an estranged son. The case stalls until detectives uncover a twisted plot by someone who seemed above suspicion. 

When a young mother and beloved coworker is found savagely stabbed in her bedroom, investigators are unable to pin down a killer until secret recordings and evidence stashed in a van lead to a sinister plot and horrific confession. 

Could the execution-style shooting of a well-loved, self-made couple be a tragic case of mistaken identity? Early leads take police down a path of greed and desperation until a paper trail leads to a calculated betrayal shockingly close to home.

After a Texas mother is found murdered in an office bathroom, her husband admits a disturbing past while police chase down a serial killer. The case goes cold until an oversight leads to a surprise suspect and an FBI manhunt south of the border.

When a devoted mother vanishes from home, a series of grisly roadside discoveries take police on a hunt for the killer. Detectives follow a path of greed and desperation until a shocking twist leads to a culprit with a bizarre motive.

When an outgoing college student is gunned down, police investigate disapproving roommates, a psychic, and an infamous serial killer. However, decades-old evidence reveals a killer that original detectives had previously overlooked.