Unusual Suspects

The leading advocate for the science of cold fusion is beaten to death and investigators theorize about a wide range of suspects, from corporate executives to burglars.

In Santa Monica, Calif., a man who killed an art teacher remains at large for years as police use every trick in the book to hunt him down.

Police make an arrest in the contract killing of a California businessman and realize it's just the beginning of the story.

The killer of a disabled Denver woman is tracked down and police try to establish whether or not she was killed for her money or if there was a more personal motive.

When a 5-year-old girl describes her mother's killer as being a ninja, police puzzle out the truth behind the child's description as they put the murderer behind bars.

Like in a scene out of one of his Westerns, a former actor is gunned down in Yuma, Ariz., and police chase down leads across the Southwest until they finally get their man.

After a well-liked teenage boy is found stabbed to death in his Salt Lake City home, detectives leave no stone unturned in their quest to solve the murder that rocked this tranquil community.

After a night out, a beautiful young woman ends up in a shallow grave, and her killer evades police for decades.

In North Carolina, a young woman's killer keeps police guessing until he slips up and finally gives them what they need to put him behind bars.

After an 8-year-old girl is found strangled to death In Ocean Shores, Wash., a local woman is instrumental in helping detectives bring the young victim's killer to justice.

After Jaime Lyn Larson is found murdered in her Portland, Ore., apartment on Christmas day, investigators learn the terrifying truth about her killer.

After 23-year-old Ashley Kline is found murdered in a Pennsylvania wildlife preserve, investigators must piece together the last few moments of her life to determine who killed her.

Philadelphia investigators bring to light the obsession that drove a suspect to murder student Deborah Wilson, who was found strangled to death in a university computer laboratory without her shoes and socks.

In 1988, a 9-year-old girl goes missing in Great Falls, Mont.; the case goes cold until a chance encounter at a bus stop breathes new life into the investigation and leads to the horrifying truth behind the girl's disappearance.

In Stockton, Calif., investigators search for 23-year-old Dalene Carlson who has gone missing, then a tractor operator makes a gruesome discovery in a cornfield.

In La Jolla, Calif., telemarketing manager David Stevens' charred body is found in his burned-out car, and detectives encounter a rogue's gallery of suspects while looking for his killer.

An elementary school teacher goes missing after her first day at a new job, and investigators sift through clues to uncover the heartbreaking truth behind her sudden disappearance.

A young Navy wife is found raped and strangled to death in her home near the Mayport Naval Station in Jacksonville, Fla.

When a beloved matriarch is found murdered, her friends and neighbors come under suspicion as detectives investigate the first homicide in the small town of Hubbardston, Mich.

In Fort Pierce, Fla., a tax attorney is found strangled to death, and detectives must scrutinize deadbeat tenants and delinquent clients while hunting for his killer.

A video tape surfaces after a naval officer is raped and stabbed suggesting the victim may have been silenced to prevent a scandal.

When a college student is found murdered in his Arlington, Texas, apartment, investigators suspect the kindhearted victim's generosity may have led a killer to his door.

Shortly before Thanksgiving, a Philadelphia suburb is rocked by the murder of 67-year-old Alice Hufnagle.

Beloved grandparents are found murdered; the investigators uncover a shocking secret behind the community's first homicide.

No episode description is available yet.

A young woman is found murdered near a nightclub; the search leads investigators into the heart of the night clubs scene and onto the trail of a gruesome killer.

A tireless investigation finally unmasks a killer years after the body of Susan Schumake is found near a trail on the campus of Southern Illinois University.

A teen is found strangled after vanishing from her group home; the investigation uncovers the killer's shocking identity.

A teen girl is killed in her home in Colorado; while defending herself she leave a clue for investigators.

In 2000, Genevieve Tetpon was stabbed and thrown off of a highway; a hidden clue reopens the case.

A businessman comes home to find his wife brutally murdered; investigators close in on a remorseless killer.

An 8-year-old boy's body is found.

The murder of a longtime resident stuns a town.

A business traveler is found dead in a hotel room.

A young women is found dead in the trunk of her car; searching for her killer unearths a deadly web of secrets.

A student is brutally murdered while at home sick.

A college student is abducted in the middle of the night.

A fortuneteller and her daughter are brutally murdered in 2005; a paper trail leads investigators to the culprit.

A hotel manager is doused with acid in broad daylight.

A former Marine goes missing from his home.

A mother's tireless pursuit for justice in her son's murder leads investigators to find a crucial clue.

Four bodies are found in a factory all with close ties to company management.

A single mother of three is found brutally stabbed in her home.

A postal worker is found murdered in his apartment; 37 years later police find evidence that leads to the killer.

In Stockton, Calif., investigators search for 23-year-old Dalene Carlson who has gone missing, then a tractor operator makes a gruesome discovery in a cornfield.

No episode description is available yet.

Two women are raped, strangled, and drowned in the same Texas apartment complex; three years later a similar case comes to light and a connection is made that leads to the same man.

A man goes out to get a beer and is shot to death; years later a cold case and a guilty conscience bring the killer to justice.

Detectives theorize that a gun advocate knew her attacker when she is found murdered in her own home.

Just after Hurricane Katrina, a man is shot by burglars; three years later evidence leads police to the culprits.

In 1990, San Diego investigators find themselves on the trail of a serial killer when six females are found murdered.

In Pennsylvania, a 20-year-old woman survives the murder of her family members in their home; investigators wonder who would want to kill this seemingly perfect family, and the answer will shock the community for years to come.

Police have to investigate their own when a fellow officer is gunned down.

A multi-agency task force shines light on the old case of an LA County Sheriff, gunned down in his vehicle.

A freshman is found shot to death in the woods behind campus.

Unlikely killer found two years after a woman is found murdered in her home.

A boy sneaks out his bedroom window from a cabin and disappears.

Grandmother accuses her boyfriend of the murder of a local woman.

A search for a serial arsonist who set a series of fires in California; after years of investigation they find the culprit.

The murder of a wealthy widow sends shock waves through a small town.

Serial killer claims the lives of more than a dozen victims in Spokane, WA.

The mother of a boy is convicted of murdering her son; years later, she is set free thanks to a confession from an unexpected source.

When a serial rapist targets St. Louis in the 1990s a multi-agency task force exhausts countless leads in its search for the mysterious predator; years later, a concerned citizens helps investigators bring an unlikely culprit to justice.

A young Navy wife is found raped and strangled to death in her home near the Mayport Naval Station in Jacksonville, Fla.

In La Jolla, Calif., telemarketing manager David Stevens' charred body is found in his burned-out car, and detectives encounter a rogue's gallery of suspects while looking for his killer.

A man is found dead in his burnt up apartment; 20 years go by before police close in on the killer.

A business man is found dead on a remote stretch of federal land.

Shortly before Thanksgiving, a Philadelphia suburb is rocked by the murder of 67-year-old Alice Hufnagle.

An elementary school teacher goes missing after her first day at a new job, and investigators sift through clues to uncover the heartbreaking truth behind her sudden disappearance.

When a beloved matriarch is found murdered, her friends and neighbors come under suspicion as detectives investigate the first homicide in the small town of Hubbardston, Mich.

When a college student is found murdered in his Arlington, Texas, apartment, investigators suspect the kindhearted victim's generosity may have led a killer to his door.

A postal worker is found murdered in his apartment; 37 years later police find evidence that leads to the killer.

In Fort Pierce, Fla., a tax attorney is found strangled to death, and detectives must scrutinize deadbeat tenants and delinquent clients while hunting for his killer.

In 1988, a 9-year-old girl goes missing in Great Falls, Mont.; the case goes cold until a chance encounter at a bus stop breathes new life into the investigation and leads to the horrifying truth behind the girl's disappearance.

No episode description is available yet.

No episode description is available yet.

No episode description is available yet.

A video tape surfaces after a naval officer is raped and stabbed suggesting the victim may have been silenced to prevent a scandal.

A single mother of three is found brutally stabbed in her home.

Four bodies are found in a factory all with close ties to company management.