When police in Rexburg, Idaho perform a wellness check on seven-year-old J.J. Vallow and his sister, sixteen-year-old Tylee Ryan, both children are nowhere to be found. Their mother, Lori Vallow, gives a phony explanation, and when officers return the following day with a search warrant, she, too, is gone. As the police begin to close in, a larger web of mystery, murder, fanaticism and deceit begins to unravel. Vallow’s case is sinuously complex. As investigators prod further, they find the accused Black Widow has an unusual number of bodies piling up around her.

John Edward Robinson was a 56-year-old grandfather from rural Kansas. An entrepreneur and Eagle Scout, he was even honored as "Man of the Year" at a Kansas City charity. To some of the women he met on the internet, he was known as Slavemaster - a sexual deviate with a taste for sadomasochistic rituals of extreme domination and torture...even killing.

Two days after Christmas, 2011, Russel Faria returned to his Troy, Missouri, home to find his wife, Betsy, dead, a knife still lodged in her neck. She had been stabbed 55 times in a brutal murder that would set off a chain of events leading to one man's wrongful conviction and imprisonment, another man's death, the revelation of a diabolical scheme, and an astounding miscarriage of justice left unresolved for another 10 years.

The names of notorious serial killers are usually well-known; they echo in the news and in public consciousness. But most people have never heard of Israel Keyes, one of the most ambitious and terrifying serial killers in modern history American Predator is the ambitious culmination of years of interviews with key figures in law enforcement and in Keyes's life, and research uncovered from classified FBI files. Callahan takes us on a journey into the chilling, nightmarish mind of a relentless killer, and to the limitations of traditional law enforcement.

In the 1920s, the richest people per capita in the world were members of the Osage Nation in Oklahoma. After oil was discovered beneath their land, the Osage rode in chauffeured automobiles, built mansions, and sent their children to study in Europe.

In a quiet community of million-dollar homes and shiny SUVs, the Nyce family projected the very image of success. Dr. Jonathan Nyce, an asthma sufferer, had achieved medical breakthroughs that made him rich - and offered hope to countless people. Michelle's beauty made her an object of desire. And adultery was her husband's worst nightmare.

Greg DeVillers was a top biotech executive, and Kristin Rossum was embarking on a career in toxicology at the San Diego Medical Examiner's office. They seemed to be happily married, living the American dream. But only months shy of their second anniversary, Kristin found her handsome husband dead from a drug overdose - his corpse sprinkled with rose petals. By his side was their wedding photo. Authorities deemed it a suicide. Until they discovered that the rare poison found in Greg's body was the same poison missing from Kristin's office.

On September 28, 2000, former Indiana state trooper David Camm made a frantic call to his former colleagues in the state troopers office: He had just walked into his garage and found lying on the floor the bodies of his 35-year-old wife Kim and their two children Brad and Jill, ages seven and five. Three days later, things got worse when police arrested David Camm for the triple murder. Soon new stories started emerging about mistresses and violent bursts of temper.

In 1991, eleven-year-old Jaycee Lee Dugard was kidnapped on her morning walk to the school bus. But despite her family's tireless efforts, Jaycee's disappearance remained a mystery. Then, in August 2009, a registered sex offender named Phillip Garrido appeared on the University of California, Berkeley, campus alongside two young women whose unusual behavior sparked concern among campus officials and law enforcement. That visit would pave the way for a shocking discovery: That Garrido was Jaycee Lee Dugard's kidnapper.

The tragic story of Susan Powell and her murdered boys, Charlie and Braden, is the only case that rivals the Jon Benet Ramsey saga in the annals of true crime. When the pretty, blonde Utah mother went missing in December of 2009 the media was swept up in the story - with lenses and microphones trained on Susan's husband, Josh. He said he had no idea what happened to his young wife, and that he and the boys had been camping in the middle of a snowstorm.

It was the trial that stunned America, the verdict that shocked us all. On July 5, 2011, nearly three years after her initial arrest, Casey Anthony walked away, virtually scot-free, from one of the most sensational murder trials of all time. She'd been accused of killing her daughter, Caylee, but the trial only left behind more questions: Was she actually innocent? What really happened to Caylee? Was this what justice really looked like?

On February 13, 2017, two Indiana teenagers, Abigail Williams, 13, and Liberty German, 14, went for a walk in the woods near the abandoned Monon High Bridge. They never returned home.

On the morning of July 18, 2014, 41-year-old Florida State law professor Dan Markel dropped his boys off at preschool, hit the gym, and headed home to his quiet, tree-canopied neighborhood. Within seconds of pulling into his garage, two .38-caliber bullets fired from point-blank range were lodged in his brain. His brutal slaying defied explanation.

Travis Alexander was a handsome, hard-working, practicing Mormon who lived in Mesa, Arizona. His good looks and easygoing manner made him popular with everyone, especially the ladies. So when he was found with a bullet wound in the face and his throat slashed, the brutal murder sent shock waves throughout his community. Who could have done something so sinister? But soon a suspect was singled out-Jodi Arias. A beautiful, aspiring photographer, Jodi had been in a long-distance relationship with Travis the year before.

Every mother's worst fear became Sharon Rocha's reality. On Christmas Eve 2002, she received a phone call from her son-in-law saying that her daughter, Laci, was missing. In the hours, days, and eventually months that followed, Sharon struggled to avoid accepting what no parent should ever have to face: the certain knowledge that her child is never coming home.

John Edward Robinson was a 56-year-old grandfather from rural Kansas. An entrepreneur and Eagle Scout, he was even honored as "Man of the Year" at a Kansas City charity. To some of the women he met on the internet, he was known as Slavemaster - a sexual deviate with a taste for sadomasochistic rituals of extreme domination and torture...even killing.

Lacey Spears made international headlines in January 2015, when she was charged with the "depraved mind" murder of her five-year-old son, Garnett. Prosecutors alleged that the 27-year-old mother had poisoned him with high concentrations of salt through his stomach tube. To the outside world, Lacey had seemed like the perfect mother, regularly posting dramatic updates on her son's harrowing medical problems. But in reality, Lacey was a textbook case of Munchausen Syndrome by Proxy.

When police in Rexburg, Idaho perform a wellness check on seven-year-old J.J. Vallow and his sister, sixteen-year-old Tylee Ryan, both children are nowhere to be found. Their mother, Lori Vallow, gives a phony explanation, and when officers return the following day with a search warrant, she, too, is gone. As the police begin to close in, a larger web of mystery, murder, fanaticism and deceit begins to unravel. Vallow’s case is sinuously complex. As investigators prod further, they find the accused Black Widow has an unusual number of bodies piling up around her.

A blonde beauty queen, missing children, six suspicious deaths, and the twisted Mormon doomsday writings of her fifth husband are only the beginning of a tragic crime saga that gripped Americans and instigated frantic searches all over the country. It all started when Lori Vallow met Chad Daybell at a doomsday prepper event. Their story grew like a wildfire that creates its own weather, and what happened next will shock even the most experienced true crime listener.

When high school sweethearts Karen and Richard Sharpe married, they shared an interest in medicine, a desire for family, and a dream for the future. For Karen, that dream became a nightmare. After years of abuse at the hands of her physician husband, she put an end to their 26-year marriage. Fearing a crushing divorce settlement, Richard ended the marriage first by unloading a .22-caliber rifle into Karen's chest. The murder revealed more about the millionaire doctor - and his double life - than polite Boston society was prepared for.

On September 28, 2000, former Indiana state trooper David Camm made a frantic call to his former colleagues in the state troopers office: He had just walked into his garage and found lying on the floor the bodies of his 35-year-old wife Kim and their two children Brad and Jill, ages seven and five. Three days later, things got worse when police arrested David Camm for the triple murder. Soon new stories started emerging about mistresses and violent bursts of temper.

In 1991, eleven-year-old Jaycee Lee Dugard was kidnapped on her morning walk to the school bus. But despite her family's tireless efforts, Jaycee's disappearance remained a mystery. Then, in August 2009, a registered sex offender named Phillip Garrido appeared on the University of California, Berkeley, campus alongside two young women whose unusual behavior sparked concern among campus officials and law enforcement. That visit would pave the way for a shocking discovery: That Garrido was Jaycee Lee Dugard's kidnapper.

In the early morning hours of August 13, 2018, Shanann Watts was dropped off at her Frederick, Colorado, home by a colleague after returning from a business trip. It was the last time anyone would see her alive. By the next day, Shanann and her two young daughters, Bella and Celeste, had been reported missing, and her husband, Chris Watts, was appearing on the local news, pleading for his family's safe return. But Chris Watts already knew that he would never see his family again. Less than 24 hours after his desperate plea, Watts made a shocking confession to police.

Chris Watts was a family man. Everybody, including his family, believed that. Yet, on August 13, 2018, he murdered Shanann, his pregnant wife, and two young daughters. As terrible as his story is, it is also a warning because to this day, living behind bars, Watts is still acting out the character traits that made him kill in the first place.

Nothing could have shocked the sleepy community of Morgantown, West Virginia, more than the lurid details that surfaced after a house fire claimed the life of Shelly Michael's husband, Jimmy. Local authorities suspected possible arson. Then they discovered that Jimmy had been dead before the fire even started - paralyzed by a fatal dose of muscle relaxant.... Did Shelly Michael, a respected nurse and mother, kill her second husband and torch her own home?

In the fall of 1999, a 22-year-old woman was discovered naked and bleeding on the streets of a small New Mexico town south of Albuquerque. She was chained to a padlocked metal collar. The tale she told authorities - of being beaten, raped, and tortured with electric shock - was unthinkable. Until she led them to 59-year-old David Ray Parker, his 39-year-old fiancee Cindy Hendy, and the lakeside trailer they called their "toy box." What the FBI uncovered was unprecedented in the annals of serial crime.

After killer Shelia Eddy pled guilty to first-degree murder and was sentenced to life in prison and Rachel Shoaf was sentenced to thirty years for second-degree murder, family, friends, investigators, and other key sources reveal the facts you would have learned if the case had gone to trial.

In a quiet community of million-dollar homes and shiny SUVs, the Nyce family projected the very image of success. Dr. Jonathan Nyce, an asthma sufferer, had achieved medical breakthroughs that made him rich - and offered hope to countless people. Michelle's beauty made her an object of desire. And adultery was her husband's worst nightmare.

Adam Cox and Rex Conner, the brother and uncle of Lori Daybell, have had their family torn apart by Lori's lies, which ultimately cost at least four innocent people their lives.

A mother and her three young children are found hacked to death in their beds. The apparent weapons, an ax and butcher knife, are found nearby. A month later, the husband and father, who was away on a business trip when the bodies were found, is accused of the killings. A successful businessman and devoted member of a fundamentalist religious group, David Hendricks has the total support of his extended family. Police paint a darker picture, and prosecutors face the daunting task of convicting him on a case based on completely circumstantial evidence.