Outside Asheville, NC, a young mother is stabbed four times in the chest and left for dead in the French Broad River. But she lives long enough to seek out help -- and leave a cryptic clue for detectives.

When their car breaks down at the mall in Beaumont, TX, a young husband tells his wife to wait while he fetches their other ride. But when he returns minutes later -- she's mysteriously vanished. Does the nearby Big Thicket Swamp hold the answers?

When a Lakota teen disappears after a night out in the mostly white town of Mobridge, SD, deep racial tensions erupt. And after her body is found in the mucky shallows of the Missouri River, detectives are stonewalled on both sides of the divide.

On the morning of her 50th birthday, a woman is found face-down in Suqualena Creek near Meridian, MS, apparently drowned. But it's no accident. Her daughter and her best friend are distraught, but as detectives learn, both are hiding secrets.

A young woman's night of partying at a roadhouse in Krotz Springs, LA, takes a sinister turn when she vanishes from the parking lot. Her desperate boyfriend suspects she made a deadly connection with an old flame -- and the nearby Atchafalaya Swamp.

In Albany, NY, a young woman storms out of the house to track down her wayward boyfriend and disappears into the night. When her body is found washed up on the mucky banks of the Hudson River, detectives realize they have a killer on the loose.

When the Stewart family wakes up one morning, their 47-year-old mom, Kathy, is nowhere to be found. The last they knew, she went for a walk in downtown Ava, MO. But when her murdered body is found in nearby Cowskin Creek, the town erupts in fear.

While her husband is away, a vivacious Army medic enjoys a night out at a dive bar near Fort Bragg, NC. But she never makes it home. And though dogs pick up her scent in a nearby swamp, her fate baffles police -- until a local P.I. takes up the case.

A Marietta, GA, co-ed is eager to make the five-hour drive home to see her parents. But she never gets there. Her friends and coworkers have no answers, and when her body surfaces in the Oconee River, detectives realize that one of them is lying.

When a young woman leaves home to join up with a goth community in Manchester, NH, her mom figures it's just a phase. But when she later disappears from a roadside bar, it's clear that something truly sinister has happened

In the marshy waters of Florida’s Indian River, a local judge makes a grisly discovery -- the body of a young woman, bound and floating in the water. Now police are searching for the person who brought 22-year-old Misty Morse to her watery grave.

In Fresno, CA, the body of Jody Lynn Wolfe washes up along the banks of Dry Creek Canal. Detectives can't imagine who could do this to the teen. But the more they learn about Jody's life, the more they begin to realize this murder hits close to home.

22-year-old mom Shawn Williams heads to the store late one night and never comes home. When her body is found the following day along an Oklahoma river, investigators wonder if one of the men in Shawn's life might be her killer.

A teenage girl is found bleeding to death along California's Deep Creek Spillway, leaving police with all kinds of questions. But when 19-year-old Raquel Rayas dies before they can get answers, detectives turn to a mysterious phone number for help.

When the body of 18-year-old Tina Hendricks is found floating in a Florida canal, officers hone in on a local bar. But with many admirers fawning over Tina that final night, it will take the help of witness testimonies to sort out friend from foe.

When the body of 18-year-old Sharyn Kills Back is found in a Texas storm drain, Arlington detectives are left with few leads. But when a tip comes in from Fort Worth police twenty years later, detectives band together to bring her killer to justice.

An innocent trip to the store ends in tragedy when the body of Linda Strait is found along the Spokane River. But with no eyewitnesses, detectives have their work cut out for them. They'll spend the rest of their careers searching for the ruthless killer.

After the body of wealthy Richard Hodges is found along the Missouri River, police find his mother has also been killed inside their home. As detectives get to work, they wonder if a secret in Richard's life might have been behind the murders.

When a night out ends in bloodshed for 23-year-old Navy veteran Raul Mendoza, Houston police have a lot of questions on their hands. But a tip from Raul's sister soon reveals that someone police have met before may hold the answers.

Bobby and Patricia Sexton have three daughters and live on her grandparent's property in Jacksonville, Texas. But when Bobby doesn't come home one evening, his worried wife, Patricia, files a missing person's report.

When the torso of single mother Mary Stetson washes up along New Hampshire's Piscataquog River, police retrace her final steps. But every place along Mary's path presents new mysteries, and people who aren't as innocent as they first appear.

When Andrea White suddenly disappears in Florida, leaving her four children behind, her concerned friends and family contact the police. As detectives investigate, they uncover a twisted, two-faced killer with a double life.

15-year-old Allison Tornensis is a teenager from the small town of Quilcene, Washington. In the summer of 1992, her body washes up on the murky shores of the Little Quil River.

Kathy Goble is a beloved mother of two and popular saleswoman at a high-end men's store in Charleston, West Virginia. When she doesn’t show up to work on a spring day in 2010, her co-workers and family know something's up.

Kenneth Richardson is an Indiana family man and an evangelist minister who knows the Bible by heart. When his body is found on the grimy banks of a Florida boat ramp in August 2001, detectives discover an arrow was the weapon of choice.