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 Orlando, a mysterious call to the sheriff's office draws investigators to a second floor apartment where a young woman has been brutally beaten.

In Hanover, Pa., townspeople are shocked when kindly 55-year-old Monica Schmeyer is found shot to death in her living room.

In Monrovia, Md., Debbie Fagan is found shot to death in her car, leading detectives to uncover a web of lies and deceit as they dig into her past to find out who would want to murder the loving mother of two.

In Norris City, Ill., Jessica Evans and Jacob Wheeler never return home after going fishing, then Wheeler's abandoned pickup truck is found with a body in its bed.

In Omaha, Neb., stage actress Pasinetta Prince is found strangled to death in her home; police draw up a long list of admirers who are possible suspects.

In Macon, Ga., Mercer Law School graduate Lauren Giddings goes missing, and police search her apartment complex, finding a human torso in a trash bin.

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

When single gal Adele Curtis meets a terrible end in her Phoenix rental property, 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 a ten year-old boy makes a quick run to the store, he runs into a nightmare instead. A strange slew of suspects pops out of the woodwork, but when police zero in on the bad guy, his motive is more shocking than anyone can imagine.

On May 22, 2004 Baton Rouge millionaire Alan Waters 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 a beloved former teacher, and mayor's wife, is found dead in her home. 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 thirteen-year-old Texas City girl Krystal Baker is found dead off the banks of the Galveston Bay, investigators round up a herd of suspects. But with little physical evidence on the scene, it takes a dedicated detective to solve this case.

A New Jersey teenager dies shortly after visiting a nail salon.

A 1992 murder in Wantage, N.J., is investigated.

Investigating the murder of a single mom in Manchester, N.H.

A woman and her two daughters are murdered in Middletown, Pa., on Christmas Eve.

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

A 28-year-old nurse is killed in Joliet, Ill.

Investigating the death of a tourist in Nags Head, N.C.

When beloved store manager Mary Peterson is found stabbed to death in her bed, storm clouds brew over sunny Lakeland, Florida. 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 prison nurse, 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, the town of Woonsocket's 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, her family 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.

A tight-knit community is stunned when the body of Cynthia Epps is found stuffed into a cabinet in her Buffalo, NY neighborhood. A clever killer eludes capture for nearly two decades 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, detectives 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, Texas 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.

The gruesome discovery of 24-year old Zilpha Lowery's body has folks in Marion, NC baffled. It's a frustrating case that sets police off on a wild ride through the victim's past until a decade old lead helps police catch a killer.

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

When Norm Leighton and Patti Hubbert, a peaceful older couple, is violently murdered, locals fear quiet Billings, Montana 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 gets a jolt when newlyweds Brian and Beverly Mauck are found shot dead in their 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, Michigan in disarray. Investigators are taken on a wild ride and are forced to eliminate a swath of suspects, only to be stunned by the true identity of a callous murderer.

After beloved custodian James Mayberry is found stabbed to death in his Wichita home, the folks of the Midwestern town 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 is rocked when long time resident 42-year-old 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.

A community's worst fears are realized when the body of 25-year-old Holly Notestine is found deep in a Clearville, Pennsylvania 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 savage murder of single mother Cindy Pavey rattles the tranquil town of Murphysboro, Illinois. Police investigate a potentially deadly love triangle, but it will take over a decade to harvest the leads necessary to bring her killer to justice.

When the body of 18-year-old Breanna Schneller is discovered in her apartment, the residents of tranquil Wausau, Wisconsin are stunned. Police hope a cell phone and surveillance videos can help them unravel the mystery surround Breanna's death.

The bloody murder of Beth Grosskopf leaves the town of Freedom, Pennsylvania 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 Jerry Martin is found brutally murdered in 1975, the city of Tulsa is left in fear. And with no solid leads, ignorance as well. 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, the people of Portland, Maine 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 Navasota, Texas are horrified when one of the pillars of their community, 54-year-old Lonnie Turner Snr., 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 Debra Rawls leaves the town of Summerfield 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, New Hampshire resident Edith "Pen" Meyer goes missing, the tiny vacation town fears the worst. Police find leads, but can't find Pen's body. When a notorious resident reveals a grudge, police move in quickly to catch a killer.

When Joanna Presti and her young daughter, Alyssa, are found slain in their Woburn, Massachusetts home, police sift through exes and neighbours to nab their murderer. But when a mysterious photo is found in the Presti home, a killer is exposed.

Residents are struck with fear when the strangled body of 21-year-old Susan Schumake is found in Carbondale, Illinois. Lack of evidence stumps cops for more than two decades, but new technology leads detectives in a direction they never expected.

The discovery of Troy Temar's charred remains in Lebanon, Ohio 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.

When nine-year-old Cyndi Allinger doesn't show up for dinner, her mom fears the worst. Is someone stalking the school-age citizens of scenic Lakewood, Washington? The most likely tip comes from the least likely witnesses, and leads to Cyndi's killer.

Shoreline, WA is shattered when Renee Powell is murdered and her home set afire. When this predator strikes again, 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.

When Dawnia Dacosta meets a hellish end, residents of Broward County, Florida are puzzled. Who would want to kill such an angelic young woman? Detectives are stumped until "divine intervention" strikes and luck leads them to a killer with evil intentions.

When 56-year-old David Lunz is gunned down in his Palm Harbor, Florida 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, Missouri is devastated when the body of eight-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, Michigan is a privileged community untouched by homicide in over 60 years. So when 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.

A small town is jolted awake when 31 year old Laura Wynn is found dead in her home. 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 a Korean-American family is terrorized in their suburban home, 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 is the epitome of small-town America. When Monica Massaro is found viciously murdered in her home, 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 Katie Sepich disappears one night only to be found raped and murdered in a land fill the next morning. It's a case that leads detectives from the victim's inner circle to a potential serial killer and then back to their own front door.

When Norma Rodriguez's murder hits the town of Port Hueneme, 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, 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 this boy got mixed up with the wrong crowd.

When Nikki Halpin is beaten to death in her home, the residents of Safety Harbor, FL are terrified that 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 North Carolina home, investigators are at a loss as to who would commit such a crime. The case gets hot when investigators find that this family home is built on buried secrets.

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, Texas 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.

Michele Harris disappears on September 11, 2001. Would she really leave behind her 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.