In Portsmouth, VA, a father comes home to find his 16-year-old daughter stabbed to death. With DNA and fingerprints police hope for an open and shut case. However, the case still goes unsolved for months until a piece of gum points to an unlikely suspect.

When Austin York, Matt Self, Mark Barbosa, and Rosa Barbosa are found dead in a McKinney, TX home, detectives embark on a three year investigation. And just when it seems like the murders may never be solved, an eyewitness breaks the case wide open.

Karin Strom is discovered strangled to death in her home. When a suspect emerges, investigators don't have enough evidence for a conviction. It will take twenty-six years to ultimately prove their case, and the final outcome surprises everyone.

Ann Branson is found stabbed and beaten to death in her Kentucky home. There is little evidence at the crime scene and investigators struggle to find a motive. Ann's financial records provide the break authorities need to help catch the killer overseas.

23-year-old Stephanie Bennett is brutally raped and murdered in her suburban Raleigh apartment. Investigators work the case for years but their leads go nowhere. A closer look at a peeping tom provides police the break they desperately need.

In Owego, NY, Michele Harris disappears on September 11, 2001. Would she really leave behind her four children and run away from her soured marriage? When blood splatters are found in the home, police begin to suspect that Michele may have met a more sinister end.

When the Korean-American Chae family is terrorized in their suburban home in 2009 in North Wales, PA, only three survive. Local investigators wonder if this is a robbery gone wrong or something more. As the case unfolds, police are shocked to learn of the betrayal behind the murder.

Bloomsbury, NJ, is the epitome of small-town America. When Monica Massaro is found viciously murdered in her home with her throat slashed, it rocks this town to its core. A tip comes in from 300 miles away to help police hunt down the killer, and the results leave residents shaken.

22-year-old college student Katie Sepich disappears one night only to be found raped, murdered and set on fire in a landfill the next morning. It's a case that leads Las Cruces, NM, detectives from the victim's inner circle to a potential serial killer and then back to their own front door.

When single mom Norma Rodriguez's murder in 1993 hits the town of Port Hueneme, CA, police are left sorting out the suspects in its wake. It will take a capricious witness and 10 years to clean up the damage. When the dust finally settles no one is more surprised than the killer.

When 27-year-old divorced father Jarrod Davidson is shot in the doorway of his Santa Barbara apartment, the neighborhood fears there's an assassin on the loose. As detectives dig deeper into Jarrod's past, they find out he got mixed up with the wrong person and a plant left at the crime scene is the key to catch his killer.

When Nikki Halpin, a divorced mother of 2, is brutally beaten at home in front of her children. She was found barely alive, but later died at the hospital. The residents of Safety Harbor, FL are terrified that a violent intruder is on the loose. But when a mysterious voice on the 911 recording reveals an eerie clue, detectives zero in on an unlikely suspect.

When 18-year-old Brittany Loritts is murdered in her Salisbury, NC, home in the summer before starting college, investigators are at a loss as to who would commit such a crime. The case gets hot when investigators find that the family home is built on buried secrets.

When 21-year-old Jamaican immigrant Dawnia Dacosta meets a hellish end in 1998, residents of Broward County, FL, are puzzled. Who would want to kill such an angelic, church-going young woman? Detectives are stumped until "divine intervention" strikes and luck leads them to a killer with evil intentions.

When 56-year-old widower David Lunz is gunned down in his Palm Harbor, FL, home, this laid-back community fears the worst. It takes investigators more than two years and a surprise clue found 600 miles from the crime scene to nail a killer from David's past.

The tiny town of Boonville, MO, is devastated when the body of 8-year-old Alyssa Owen is found near a rural country road. When another body turns up six weeks later, investigators soon learn the senseless brutality of this double homicide.

Grosse Point, MI is a privileged community untouched by homicide in over 60 years. So when bookkeeper Barbara Iske is found murdered in the driveway of a local home, the village is shocked. Police use the little evidence they have to catch the killer.

The small town of Poplar Bluff, MO, is jolted awake in 1992 when 31-year-old Laura Wynn is found sexually assaulted and strangled to death in her bedroom. And when a double homicide hits a nearby town, people are terrified. Thirteen years later their fears are confirmed when DNA proves the killer lives among them.

When 18-year-old Breanna Schneller is discovered stabbed to death and her throat slashed in her apartment where she lived with her fiancé and his brother, the residents of tranquil Wausau, WI, are stunned. Police hope a cell phone and surveillance videos can help them unravel the mystery surrounding Breanna's death.

The bloody murder of Beth Grosskopf in 2009 leaves the town of Freedom, PA, riddled with fear. Hopes for quick justice are dashed when the initial suspects don't pan out. But when someone reveals his inner demons, cops move in to catch the killer.

When accountant and two-time divorcee Geraldine 'Jerry' Martin goes missing, and is later found viciously murdered and mutilated in 1975, the city of Tulsa, OK, is left in fear. With no solid leads, it takes detectives more than 25 years and new DNA evidence more than 1000 miles away to warm up this cold case.

When 25-year-old Amy St. Laurent disappears after a night out on the town in 2001, the people of Portland, ME, are terrified. With no body, police don't know what to make of it. But their worst fears are confirmed when a shocking discovery proves murder.

The residents of the small town of Navasota, TX, are horrified when a pillar of their community, 54-year-old funeral home owner Lonnie Turner Sr., is found shot dead in his home. As investigators dig into the case, they discover this brutal murder may be a family affair.

The gruesome slaying of adored resident and wife 48-year-old Debra Rawls in 2004 leaves the small town of Summerfield, FL, paralyzed with fear. A swath of hooligans quickly deepens the suspect pool, but a speck of blood makes the biggest splash in discovering the true identity of the killer.

When Goshen, NH, resident 55-year-old Edith 'Pen' Meyer goes missing, the tiny vacation town fears the worst. Police find leads, but can't find the body. When a notorious resident reveals a grudge, police move in quickly to catch a killer.

When 34-year-old single mom of three Joanna Presti and her 12-year-old daughter, Alyssa, are found slain in their Woburn, MA, home, police sift through exes and neighbors to nab their murderer. But when a mysterious photo is found in the Presti home, a killer is exposed.

Residents are struck with fear in 1981 when 21-year-old Southern Illinois University senior Susan Schumake is found raped and strangled to death on campus in Carbondale, IL. Lack of evidence stumps cops for more than two decades, but new technology leads detectives in a direction they never expected.

The July 4, 1999 discovery of the charred remains of 30-year-old construction business owner Troy Temar in Lebanon, OH, rattles the nerves of its residents. Police are led astray for 6 years until an accomplice's confession exposes a sinister plot orchestrated by a devious killer linked to Troy's past.

On July 4, 1996, 9-year-old Cyndi Allinger doesn't show up for dinner and her mom fears the worst. Is a predator stalking the school-age children of scenic Lakewood, WA? The most likely tip comes from the least likely witnesses, and leads to Cyndi's killer.

Shoreline, WA is shattered when 43-year-old nurse Renee Powell is murdered and her home set afire. When the killer strikes again exactly 30 days later with the same M.O., police fear they have a serial killer on their hands. But the trail grows cold and it takes a jilted lover to shake this case loose.

A dream life ends when pretty mom-to-be Kelsey Monahon is found hogtied and beaten in her beachfront home.At first, the bizarre scene looks like a home invasion, but detectives dig deeper and turn up a trio of unlikely suspects including Kelsey's husband.

24-year old waitress Zilpha Lowery goes missing in July 1993. Six months later, the gruesome discovery of her body has folks in Marion, NC, baffled. It's a frustrating case that takes police through the victim's past but goes cold until a decade-old lead helps police catch a killer.

The 2009 brutal slaying of 32-year-old divorcee Stacie Ann Smith, a single mom of 2, has the townsfolk of St. Albans, WV, reeling. The murderer's message at the crime scene baffles investigators and citizens are shocked that a killer lives in their midst.

When peaceful older couple 69-year-old Norm Leighton and 44-year-old Patti Hubbert are violently murdered and their apartment is set on fire, locals fear quiet Billings, MT, is turning into the Wild West. And when the couple's neighbor turns up dead, police are off on a wild ride to solve the case.

The sleepy town of Graham, WA, gets a jolt in November 2007 when young newlyweds Brian and Beverly Mauck are found shot to death in their rural home. Leads from friends and family send police on a wild goose chase, but cops soon find out one helpful tipster is the ruthless killer.

84-year-old Charles Taylor's grisly murder has the entire city of Warren, MI, in disarray. Investigators are forced to eliminate a swath of suspects, only to be stunned by the true identity of a callous murderer.

After beloved retired custodian James Mayberry is found stabbed to death in his Midwest home in 2002, the folks of Wichita, KS, are in shock. Detectives are stumped until a break comes faster than a prairie tornado that pins down the heartless killer.

The quiet town of Tomahawk, WI, is rocked when long time resident 42-year-old grandmother Tracy Maurer is found brutally stabbed to death in her home. Police have a laundry list of suspects but it's a tip from the rumor mill that finally brings closure to the case.

In 2000, 25-year-old engaged mom Holly Notestine goes missing from her Clearville, PA, home in front of her 2 young children. Leads run out and the case goes cold. Four years later, her body is found deep in a logging forest. After years of fuzzy clues and dead-end tips, cops nab a ruthless killer lurking just around the corner.

In 2006, Christmas cheer hits an all-time-low in Hubbardston, MI when 80-year-old Billie Cunningham is found murdered in her home. Years pass as police search for a vicious killer. But it turns out the shocking confession is well worth the wait.

The 1991 savage rape and murder of 22-year-old Cindy Pavey, single mom of 2, rattles the tranquil town of Murphysboro, IL. Police investigate a potentially deadly love triangle, but it will take 17 years to harvest the leads necessary to bring her killer to justice.

When beloved store manager 47-year-old Mary Peterson is found stabbed to death in her bed in 1995, storm clouds brew over sunny Lakeland, FL. Cops race through a lengthy list of suspects, but a tip from an unlikely source helps nab the cold-blooded killer.

On April 15, 2004, residents of Riverton, WY are worried about more than the IRS after the brutal murder of 39-year-old prison nurse, wife and mom Tammy Watts. Police begin an all out manhunt for the killer and it takes a hair-raising discovery for them to nab their guy.

When friendly cashier Tammy Petrin is found shot execution style at the local burger joint in 1991, the town of Woonsocket, RI, is in shock. After lead suspects don't serve up answers, a helpful hooker and letters from jail might be just what detectives ordered.

When 12-year-old Michelle Winter goes missing without a trace while walking back from her best friend's house in Springfield, MO in 1995, her mom doesn't have a clue as to who could have whisked this pre-teen away. Cops have many leads, but it isn't until evidence is linked to the killer that they get their big break.

The tight-knit community of eastside Buffalo, NY is stunned in 1994 when the body of beautician and single mom Cynthia Epps is found stuffed into a cabinet placed in a neighbor's backyard next to a vacant lot cut-through; she had been raped, stabbed and nearly decapitated. A clever killer eludes capture for 16 years, but new technology and dogged detective work put him behind bars.

When a sip from the office water cooler turns deadly for secretary Julie Williams in 1986, detectives in Tempe, AZ are stumped. Who could have had it out for this sweet single mom? Investigators search for the mystery mixologist and are shocked at who they stir up.

In late 2007, Jasper, TX, native Martin Byerly disappears without a trace. Police look into the 58-year-old ladies man's dance card but can't seem to pin anything on a femme fatal. Then an unlikely tipster helps them learn what happened to Martin.

In the quaint city of Portage, IN, everyone starts pointing fingers when 8-year-old Sarah Paulsen is brutally assaulted and murdered in 1995. Cops wade through hundreds of tips to try and figure out if her killer is a creepy local or a sketchy stranger.

When divorcee Adele Curtis, a mom of 5 adult children, meets a terrible end in her Phoenix, AZ, rental property in 1996, detectives delve into a series of suspects to find the killer. But when the search goes cold as a desert night, it takes the dawn of DNA to catch this murderer.

When 10-year-old boy Vernie Mitchell makes a quick run to the store in Trenton, NJ, in January 1976, he runs into a nightmare instead. He was found deceased with 47 stab wounds and severe blunt trauma to his head. A strange slew of suspects pops out of the woodwork, but the case goes cold. When police zero in on the bad guy 18 years later, his motive is more shocking than anyone can imagine.

On May 22, 2004, Baton Rouge, LA, self-made millionaire Alan Waters, a divorced father of 2, is found shot to death inside his mansion. Police think his real estate business is to blame but they can't solve this deadly puzzle until someone close to Alan comes forward with the missing piece.

In Lanett, AL, things just aren't adding up when 49-year-old Charlotte Waites, a beloved former teacher and mayor's wife, is found dead in her home in 1998. Friends try to put two and two together, but they come up with zero reasons anyone would want her dead, and police are just as stymied.

When a Texas City, TX, girl, 13-year-old Krystal Baker, a great-niece of Marilyn Monroe, is found dead off the banks of Galveston Bay in 1996, investigators round up a herd of suspects. But with little physical evidence on the scene, the case goes cold. It takes a dedicated detective to solve this case 14 years later.

After 16-year-old Sherita Williams takes a quick trip to the nail salon in Pennsauken, NJ, she is sexually assaulted, strangled to death and dumped under a bridge in 2003. Police dig up a cast of potential villains but the case goes cold. When the true killer finally appears through a DNA match 4 years later, they find he's in a class all his own.

In early fall of 1992, the rural community of Wantage, NJ, is rocked by the murder of beloved local Christine Schurman. Police are at a loss for suspects until a tip about another murder committed in Missouri connects them to their killer.

When Manchester, NH, single mom Mary Stetson goes out to her favorite haunt, she doesn't come home. Hours after Mary is reported missing, a woman's torso is found wrapped in a duffel bag in a popular swimming spot. Is this Mary? The police investigate, but only a tip from a mystery woman reveals Mary's killer.

Holiday cheer ends in holiday fear, when Jean Wholaver and her two daughters are murdered in their home on Christmas Eve. Detectives in Middletown, PA, check their list of suspects twice and are shocked by the killer's true identity.

When the lifeless body of Christian Rojas is found battered, his friends in Bensalem, PA, are beside themselves with fear. Detectives are on the hunt for a savage killer but are surprised that it's one of Christian's friends that has become a murderous foe

Joliet, IL, firefighters are shocked to find 28-year-old Melissa Plut strangled to death when they respond to a fire in her duplex. Police search the maternity nurse's love life with no luck until a 9-1-1 call unmasks her killer hiding in plain sight.

When pretty Nags Head, NC, tourist Janet Siclari turns up dead on the beach outside her hotel, the fun comes to an end. When a hurricane blows leads out of town, police wonder if the killer escaped too. Only time can help detectives catch the culprit.

On a sunny summer day in Orlando, FL, a city known for theme parks and family fun, a professional woman vanishes in broad daylight. When her naked body is found dumped in the woods days later, detectives jumpstart a manhunt for her depraved killer.

When Bob Eidman is found executed in his office in broad daylight, the people of St. Charles are terrified a cold-blooded killer is on the loose. But when police discover Bob's secret life, they expose a slew of suspects with motive for murder.

In the small, snowbound city of Bangor, MI, the murder of Christopher Green sends shivers up the citizens' spines. Detectives must follow the few clues they have down a path of unsavory characters, deception, and lies, to a chilling outcome.

A mysterious call draws the Sheriff's Office in Orlando, FL, to a young artist's second floor apartment, where she's found brutally beaten. With few clues to investigate, can detectives uncover this shadow in the night before he strikes again?

When kindly 55-year-old Monica Schmeyer is found shot to death in her living room, the peaceful people of Hanover, PA, are in a state of panic. Investigators have no idea who would want to kill this gentle woman and they have few clues to go on.

When Debbie Fagan is found shot to death in her car, the small town of Monrovia, Maryland, fears the worst. Who would want to do this to a loving mother of two? But as detectives dig into Debbie's past, they uncover a web of lies and deceit.

When Jessi Evans and Jake Wheeler go fishing -- and never come home -- the townsfolk of Norris City, IL, fear the worst. Then, after Jake's truck is found at an abandoned house with a body in its bed, detectives uncover a twist that rocks this God-fearing community to its core.

When stage actress Pasinetta Prince is found strangled to death in her home, the close-knit community of North Omaha, NE is left reeling. As police dig deeper into the life of the beautiful starlet, they find a long line of admirers who are possible suspects.

The charming town of Macon, GA, panics when Mercer Law School grad Lauren Giddings goes missing, and police search her apartment complex, finding a human torso in a trash bin. Detectives uncover multiple suspects with motive and means. But only one person in the group is sadistic enough to kill.

In Traverse City, MI, 16-year-old Kathey Horn vanishes into the night. As police work tirelessly to find her, they uncover an underworld in their majestic town filled with nomadic hippies, witches, and cults.