After a 28-year-old teacher for deaf children is murdered in 1973, detectives must immerse themselves in the swinging nightlife of New York City to solve the case.

Ten-year-old Leona O'Loughlin fails to show up at school, while her detective father Leo falls violently ill; investigators consider the chilling possibility that someone may be trying to eliminate the entire family.

A detective struggles to exonerate his black friend from rape allegations pinned on him by the LAPD's all-white brass; he must navigate entrenched racism, lead a stake-out and employ the magic of Hollywood to ensnare the real predator.

In 1963, Carol Thompson, church-going wife and devoted mother of four, is found in a bloody heap on her neighbor's doorstep; now, detectives must peel away the layers of her picture-perfect life to reveal the victim's painful secrets.

In Bronx, N.Y., 1941, tea for two ends in murder, and investigators must count on the testimony of a few brave women to bring the killer to justice.

Patricia Jones' bullet-ridden body turns up in a secluded spot in Kansas City, Mo., and Detective Browning trails her killer from Missouri to Mexico, taunted by the sly smiles of his arch nemesis.

In Los Angeles, 1922, a man is found dead, while his wife is discovered locked in a closet, and detectives soon find themselves caught up in a world of seduction and obsession where the ghosts are all too real.

In Los Angeles, 1968, Cheryl Perveler is found bleeding to death in her sports car with a gunshot wound to the head, then investigators delve into Perveler's life and uncover an outlandish plot that defies belief.

An analysis of the 1964 rape and murder of Kitty Genovese and whether it truly exemplifies the psychological phenomenon known as "bystander effect."

In 1958, two love-struck, sex-crazed teenagers embark on a killing spree in Lincoln, Neb., and it will fall to one local sheriff to put the brakes on this nightmare of a joyride.

In 1961, police uncover a shocking high school rumor as they search for teenager Betty Williams in Odessa, Texas.

The blood-soaked body of 76-year-old Franklin Bradshaw is found behind the counter of his auto-parts store, prompting detectives to dig into the strained history of his family and uncover a hotbed of deceit, manipulation and all-consuming greed.

In 1968, a Gaffney, S.C., reporter receives a telephone call from a murderer who threatens to kill again.

In what became known as the crime of the century, a boy from one of Chicago's wealthiest families is kidnapped and found murdered; the ensuing investigation zeroes in on the wealthy, thrill-seeking college students, Nathan Leopold and Richard Loeb.

Four members of the Mark family are found murdered in their Cedar Falls, Iowa, home, prompting police to suspect someone close to the family; the bizarre outcome shakes the townspeople and devastates the surviving members of the Mark family.

The story behind author Truman Capote's classic non-fiction novel, "In Cold Blood," which details the Clutter family murders in 1959 and the nationwide manhunt for the killers that followed.

Heiress Barbara Mackle is kidnapped and buried alive in a coffin-like capsule; local police and the FBI race to Mackle's abductor before her time underground runs out.

Chicago is gripped with terror after three bizarre and savage murders go unsolved; police officers and newspaper reporters are eager to deliver a suspect amidst the public furor.

In 1970, an entire family is discovered shot and drowned in their own swimming pool in Santa Cruz, Calif., and investigators must search psychedelic hippie communes to solve this Manson-style murder.

In 1934, Eric Madison is found shot to death in a boarding house at the back of the Warner Bros. lot, and his beautiful widow, Nellie, is convicted of murder and sentenced to death.

Marilyn Sheppard is found beaten to death in her bedroom in 1954, and it will take more than 30 years for investigators to piece together the truth of what happened the night she died.

Aphrodite Jones' numerous true-crime books have captivated readers for years. Now, the best-selling author and criminal profiler brings her uncanny instincts to this series that focuses on the compelling cases that commanded the headlines. From the unsolved murder of child beauty-pageant contestant JonBenet Ramsey to the strange circumstances surrounding the deaths of singer Michael Jackson and model Anna Nicole Smith, Jones presents her expert take on the crimes, often accompanied with startling new footage, evidence and interviews.

From the outside, families seem like harmonious units in loving homes. But you don't necessarily know what secrets families are hiding from the outside world. This series, narrated by actress Brenda Strong, explores families hiding the most extreme of family secrets: murder. Each episode explores a death in a family, unraveling the motives of the family members, all of whom are potential suspects -- and potential victims. Sibling rivalries, disputes over family businesses and infidelity are some of the factors that lead to the families' ultimate betrayals.

Veteran journalist Paula Zahn steps out of the studio and into the field to unravel criminal investigations, tracking the drama of each story by featuring the opinions of those closest to the case, including law enforcement officials, the families of the victims and the incarcerated, lawyers from both sides, and first-time TV interviews with convicted murderers.

While most killers act alone, there's another type of murder that happens less frequently yet still produces horrific consequences. That's when people decide to kill as a group. This Investigation Discovery series details true-crime cases that involve victims who have been savagely murdered by their own friends. Stylized re-enactments featuring first-person accounts from law enforcement personnel and friends and family of the victims accompany each story.

There's a reason murder investigations don't begin with preconceived notions. Sometimes those least expected to be capable of committing such dark deeds -- respected role models and trusted members of the community -- can have a sinister side. "Unusual Suspects" documents baffling, challenging investigations, actual cases that were anything but cut and dry. Episodes feature in-depth interviews with leading law enforcement personnel combined with stylized re-enactments, illustrating how illusive offenders evaded capture for years before being undone by persistent police work.

From blushing brides turned cold-blooded killers to smitten grooms with shocking dark sides, "Fatal Vows" examines the criminal psychology behind deadly divorces. Guiding viewers through actual stories of love gone wrong are psychotherapist Stacy Kaiser and forensic/clinical psychologist Dr. Brian Russell, who examine each couple to better understand how the marriage turned from flawed to fatal. Stylized re-enactments are supported by interviews with family, friends, law enforcement, and potential victims of the crime, while Kaiser and Dr. Russell provide analysis on unions that break down until divorce and murder collide.

Chilling scenarios unfold in this true-crime series, which tells actual stories of people who shared their lives with loved ones who became killers. Each hourlong episode puts viewers in the shoes of the loved one, who first notices that something is amiss, interprets the puzzling signs and clues, and eventually comes face-to-face with the horrible truth: that the person has a very dark side. Exclusive interviews and firsthand accounts of the critical moments leading up to the vicious acts showcase devastating, often undiscussed consequences on the people who have nurtured, loved and raised a murderer.

Lt. Joe Kenda spent 23 years in the Colorado Springs Police Department, where he amassed a lifetime of memories catching killers and helping solve close to 400 homicide investigations. The vivid memories are brought back to life in this hourlong series, as Kenda reopens his "Murder Books" for viewers -- folders in which every detail of his murder cases is held -- to revisit the most disturbing cases still haunting him today. As he details the process of how he solved the crimes, Kendra also embarks on a personal journey, coming to terms with long-suppressed nightmares. As he says, "I don't want to tell these stories. I need to."

Dark dreams see the light of day in "Your Worst Nightmare," a typical Investigation Discovery true-crime series complete with jump-out-of-your-seat moments and chilling conclusions. Classic suspense film techniques highlight re-enactments of creepy, harrowing crimes, as victims' darkest dreams become unfathomable realities. Each hourlong episode features one story interlaced with commentary from law enforcement, criminal justice professionals, and psychologists, plus accounts from friends and family of the victim.

Powerfully emotional stories tell of people who have been targets of compulsive stalkers. According to the Centers for Disease Control and Prevention, more than 6 million people in the U.S. are stalked each year, and in most instances, the stalker is someone the victim already knows. The series' hourlong episodes dramatize actual cases through visceral re-enactments and pointed testimony of victims, family members and law enforcement authorities, revealing what happens when stalkers can't have what -- or who -- they want, and stop at nothing to ensure that no one else can either. The chilling accounts probe the mechanics of an obsessive mind and the devastating impact of delusion.