There was no pattern to the murders, no common thread other than the fact that the victims were all vacationers, robbed of their possessions, and slain in seemingly random crimes. Authorities across three continents and a dozen nations had no idea they were all looking for the same man: Charles Sobhraj, aka "The Serpent". A handsome Frenchman of Vietnamese and Indian origin, Sobhraj targeted backpackers on the "hippie trail" between Europe and South Asia. A master of deception, he used his powerful intellect and considerable sex appeal to lure naive travelers into a life of crime.

Schoolteacher Olivia Dare Christian was murdered in her Hampton, Virginia, apartment in 1981. Her killer left few clues and the murder went unsolved. Three decades later, in 2011, next-generation detective Randy Mayer re-opened Olivia's dusty cold case file and began unraveling the mystery. Mayer located a reluctant witness who was a teenager back in 1981. She recalled a suspicious man lurking outside Olivia's apartment the morning of the murder and provided a detailed description of the man. 

The summer of 1983 was like no other in Joliet, Ill., a hard-working, rough-and-tough blue-collar industrial city an hour’s drive southwest of Chicago. During one of the hottest summers on record, the citizens of Joliet, were terrorized by an elusive serial-killing madman.

She was a beautiful, gifted descendant of Lady Astor. But Elizabeth Haysom was also a spoiled, willful daughter of privilege. He was the brilliant young son of a German diplomat. But his love for Elizabeth would draw Jens Soering into a web of madness and murder. When Elizabeth's parents were found savagely butchered in their elegant Virginia country home, she and Jens fled to Europe - igniting an international manhunt that spanned three continents.

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.

At first, the residents of Kauai Beach Resort took little notice of their new neighbors. The glamorous blonde and her tall husband fit the image of the ritzy gated community. The couple seemed to keep to themselves - until the police knocked on their door with a search warrant. Lori Vallow and Chad Daybell had fled to Hawaii in the midst of being investigated for the disappearance of Lori's children back in Idaho - Tylee and JJ - who hadn't been seen alive in five months.

For weeks, the body count of sexually violated, brutally murdered young women escalated. With increasing alarm, Los Angeles newspapers headlined the deeds of a serial killer they named the Hillside Strangler. The city was held hostage by fear. Darcy O'Brien weds the narrative skill of an award-winning novelist with the detailed observations of an experienced investigator to unravel this chilling true-crime story. 

Sixteen-year-old Patricia Columbo began working for pharmacist Frank DeLuca, a married father of five, in the 1970s, and the two soon entered into a sexual relationship. Against her father's wishes, Patricia and Frank moved in together. Then, in Elk Grove Village, Illinois, Patricia's father was brutally murdered, along with her mother and 13-year-old brother. Police were suspicious of Patricia's strange behavior after the bodies were discovered, and following their investigation, they arrested both Patricia and Frank. 

Seven Bones is the story of one of the more bizarre murder investigations in Australia’s history. Two wives die in suspicious circumstances: co-incidence or, as husband Thomas Keir describes it, ‘bad luck’? Three years after Thomas Keir alleged his first wife, Jean, deserted him and her young son for another man, his second wife, Rosalina, Jean’s cousin, lay scorched and strangled on her bed. Arriving on the scene, Detective Peter Seymour realised he was either dealing with the world’s unluckiest husband or a serial wife killer.

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.

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.

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. 

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 September 2010, at the beginning of the academic year at Sarah Lawrence College, a sophomore named Talia Ray asked her roommates if her father could stay with them for a while. No one objected. Her father, Larry Ray, was just released from prison, having spent three years behind bars after a conviction during a bitter custody dispute.

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.