He was a captain in the U.S. Air Force. She was a psychologist in Fayetteville, North Carolina. On the surface, Marty and Michelle Theer appeared to be the perfect married couple. But no one knew of the double life Michelle was leading. Tired of spending one too many nights apart from Marty who was often away on his flight missions, Michelle turned to the Internet to meet men and relieve her loneliness. With each encounter, Michelle became more daring in her sexual escapades. But one man stood out among all the rest: former U.S. Army Staff Sergeant John Diamond.

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.

As an exotic dancer at The Great Alaskan Bush Company in Anchorage, Mechele Hughes Linehan knew how to captivate men. Three of them were convinced she was engaged to them. Then one spring morning in 1996, one man, Kent Leppink, was found in the snow, shot in the head....Days before his death, Kent had removed Mechele's name from his million-dollar life insurance policy. He wrote a letter to his family stating that, should he meet foul play, Mechele would likely be among those involved. But she wasn't charged with Kent's death. She married a doctor, moved to Olympia, Washington, and began a new life.

Wealthy, beautiful, and brilliant, Shele Danishefsky had fulfillment at her fingertips. Having conquered Wall Street, she was eager to build a family with her much younger husband, promising Ivy League graduate Rod Covlin. But when his hidden vices surfaced, marital harmony gave way to a merciless divorce. Rod had long depended on Shele's income to fund his tastes for high stakes backgammon and infidelity - and she finally vowed to sever him from her will. In late December 2009, Shele made an appointment with her lawyer. She would never make it to that meeting.

She was his second wife - to die. Coming off a failed marriage, a beautiful woman named Toni joined an online dating site hoping to find true and lasting love. Harold Henthorn seemed like her dream come true, a handsome man who said he had “[A] heart for others”. Only weeks after meeting, they were wed. But Toni's family began noticing Harold's dark side, especially his controlling nature, which Toni didn't seem to mind. Until she met her end at the bottom of a ravine. Was he a grieving husband - or a black widower?

West Coast doctor Kenneth Stahl would do anything to free himself from his wife Carolyn. Then Adriana Vasco - Kenneth's former receptionist and mistress of nine years - obliged by introducing him to ex-con Dennis Earl Godley. The deal was set. Godley would murder Carolyn for thirty-thousand dollars. On the day after her 44th birthday, the trusting victim was lured to a lonely stretch of road. The deadly rendezvous took a shocking turn. Not only was Carolyn gunned down with a .357 Magnum, but Kenneth would also be killed.

Former stripper-turned-suburban-housewife Marjorie Orbin filed a missing person's report on her husband. She claimed that Jay, a successful art dealer, had left town on business after celebrating their son's birthday more than a month before. Jay loved his family more than life itself - and no one believed he would ever abandon them. Authorities suspected foul play

In June 2014, 19-year-old Erin Corwin was living a quiet life in Twentynine Palms, California, expecting her first child with her husband, US Marine Corporal Jon Corwin - until the day she drove off into the desert and never returned. As temperatures climbed into the hundreds, friends and family teamed up with local law enforcement in a grueling search of Joshua Tree National Park. Nearly two months after her disappearance, Corwin's body was found at the bottom of an abandoned mine shaft, a homemade garrote wrapped around her throat.

Colorado, 1976. When Reverend Mike Fuller and his beautiful wife, Sharon, arrive in the sleepy town of Rocky Ford, local residents think something’s off about the new couple. The God-fearing minister is gruff and cold, while charismatic Sharon has her husband wrapped around her finger.

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.

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.

On October 23, 1989, affluent businessman Charles Stuart made a frantic 911 call from his car to report that he and his seven-months-pregnant wife, Carol, a lawyer, had been robbed and shot by a Black male in the Mission Hill neighborhood of Boston. By the time police arrived, Carol was dead, and the baby was soon lost as well. The attack incited a furor during a time of heightened racial tension in the community. Even more appalling, while the injuries were real, Stuart’s story was a hoax: He was the true killer.

The day before Halloween 2004 was the last day on Earth for respected, well-liked college professor Fred Jablin. That morning, a neighbor discovered his body lying in a pool of blood in the driveway of Jablin's Virginia home. Police immediately turned their attentions to the victim's ex-wife, Piper, a petite, pretty Texas lawyer who had lost a bitter custody battle and would do anything to get her kids back. But Piper was in Houston, 1,000 miles away, at the time of the slaying and couldn't possibly have been the killer...could she?

Jenn Corbin appeared to have it all: two dear little boys, a posh home in one of the upscale suburbs of Atlanta, expensive cars, a plush houseboat, and a husband - Dr. Bart Corbin, a successful dentist - who was tall, handsome, and brilliant. But gradually, their seemingly idyllic life together began to crumble. Bart was distraught and Jenn seemed disenchanted. Then, just a few weeks before Christmas 2004, Jenn was found dead with a bullet in her head, an apparent suicide....

Loni Ann, Cynthia, Lauren, Cheryl, and Sara seemed to have it all - beauty, wealth, children, and a husband who they believed to be this perfect man - Brad Cunningham. He was handsome, charismatic, and mysterious. They adored him and tried to give him all he wanted. But he wanted everything: sex, money, and it seemed, their very lives. How long would it take before he finally got what he deserved?

She was his second wife - to die. Coming off a failed marriage, a beautiful woman named Toni joined an online dating site hoping to find true and lasting love. Harold Henthorn seemed like her dream come true, a handsome man who said he had “[A] heart for others”. Only weeks after meeting, they were wed. But Toni's family began noticing Harold's dark side, especially his controlling nature, which Toni didn't seem to mind. Until she met her end at the bottom of a ravine. Was he a grieving husband - or a black widower?

All Diane Bertalan really knew of her new husband, John, was that he was a widower, he lavished her with gifts, and he preferred to keep his past a secret. What she didn't know was that the FBI had been watching him for years. In the fall of 2000, she found out why - it was a crime that had been haunting authorities for decades. They called it the mystery of the Lady in the Box.

He was a captain in the U.S. Air Force. She was a psychologist in Fayetteville, North Carolina. On the surface, Marty and Michelle Theer appeared to be the perfect married couple. But no one knew of the double life Michelle was leading. Tired of spending one too many nights apart from Marty who was often away on his flight missions, Michelle turned to the Internet to meet men and relieve her loneliness. With each encounter, Michelle became more daring in her sexual escapades. But one man stood out among all the rest: former U.S. Army Staff Sergeant John Diamond.

One woman, Raynella Dossett Leath; two husbands, prosecutor Ed Dossett and barber Dave Leath: A startling piece of evidence brought the whole sordid tale to light. A cattle stampede, an attempted murder, a three-shot suicide, a pedophile, two medical examiners threatening to shoot law enforcement officials, a secret city, and a love child - this story has it all, proving the old aphorism that truth is stranger than fiction.

On a May evening in 1998, the idyllic marriage of wealthy Lake Tahoe couple Peter and Rinette Bergna ended in a crush of metal. Peter was thrown from the vehicle and lived. Rinette, strapped in her seat, died on impact. In time, the grieving widower would meet a new woman, and put the tragic past behind him. Two-and-a-half years later, his life took another fateful turn. Bergna, esteemed art appraiser and son of one of California's most prominent attorneys, was indicted for the murder of his wife. Was Rinette's death really an accident - or deliberate homicide?

He'd been shot in the head, decapitated, and set on fire. Who could have turned on the real-estate ace with such bloodthirsty fury? Even before the remains were found, circumstantial evidence was building against Rudin's 52-year-old wife, Margaret, who stood to inherit a handsome share of her husband's fortune. Rudin's friends also suspected Margaret, and the victim had thought that his wife was trying to poison him when he was alive. Then a chilling caveat was discovered in Rudin's living trust: should he die under violent circumstances, an investigation should be conducted.

A promising young attorney and a dedicated family man, Michael Fletcher seemed to have it all. But in the summer of 2000, Michael found himself standing trial for the murder of his pregnant wife, Leann. The verdict - guilty of second-degree murder - would leave friends, family, and the public at large scrambling to make sense of a twisted and frightening series of events that ended in the brutal killing of Leann Fletcher. What could possibly have led Michael Fletcher to commit such a gruesome act?

Casper, Wyoming: 1973. Eleven-year-old Amy Burridge rides with her 18-year-old sister, Becky, to the grocery store. When they finish their shopping, Becky's car gets a flat tire. Two men politely offer them a ride home. Yet they were anything but good Samaritans. The girls would suffer unspeakable crimes at the hands of these men before being thrown from a bridge into the North Platte River. One miraculously survived; the other did not.

On a cold January morning, the killer executed Assistant District Attorney Mark Hasse in broad daylight. Eight shots fired a block from the Kaufman County Courthouse. Two months later, a massacre. The day before Easter, the couple slept. Bunnies, eggs, a flower centerpiece gracing the table. Death rang their doorbell and filled the air with the rat-a-tat-tat of an assault weapon discharging round after round into their bodies. Eric Williams and his wife, Kim, celebrated the murders with grilled steaks. Williams planned to exact revenge on all those who had wronged him.

In the summer of 1985, in his exclusive Upper East Side Manhattan apartment, Robert Bierenbaum, a prominent surgeon and certified genius, strangled his wife Gail to death. He then drove her body to an airstrip in Caldwell, N.J., and dumped it into the Atlantic Ocean from a single-engine private plane. The next day he reported her missing.