The story behind Truman Capote's classic In Cold Blood when the four members of the Clutter family are brutally murdered, detectives mount a nationwide search for the killers and face the chilling prospect that they died for no reason whatsoever.

Los Angeles, CA, 1968: It's a temperate evening in the L.A. Castilian apartment complex, but something is amiss inside the adjacent parking garage.

Santa Cruz, CA, 1970: Police respond to a blazing house fire and are shocked at their discovery – three adults and two children are found ritualistically bound, shot, and drowned in their own swimming pool.

1934: Eric Madison is found dead in a boarding house at the back of the Warner Brother's lot. But in an age where propriety is paramount, will the punishment fit the crime?

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

1960: When wealthy Mary Burge is found strangled in her bed, detectives encounter a world of hooded Klan members and blue blood Yankees where the truth is stranger than fiction.

Easter Sunday turns deadly when a pin-up model and two others are discovered brutally murdered. Religion, art, and madness come together in this twisted tale of love and obsession.

1966: It starts with a simple knock on a bedroom door, and begins one of the most infamous mass murders in American history. A strange man enters the home of nursing students and systematically tortures, rapes, and murders eight young women, then disappears into the night. The investigation follows a series of wild twists and turns as police coordinate a citywide dragnet to capture one of the most violent criminals in history before he strikes again.

1968: When a local reporter receives a mysterious phone call from a murderer who threatens to kill again, Gaffney police must race against the clock to try to save the town's teen girls.

Kansas City, MO, 1953: Bobby Greenlease has been kidnapped. When the largest ransom payout in history fails to bring Bobby back, St. Louis' shadiest characters must track down the culprits.

Money and influence allow the Greenlease's to keep the FBI out of the case, but when the largest ransom payout in history fails to bring Bobby's safe return, it will fall to the hands of St. Louis' shadiest characters to track down the culprit.

Gretchen is a wild child - beautiful, blonde, and impulsive - but Wendy is a goodie-two-shoes. In a town known for its delinquents and runaways, the Fritzes must accept that their daughters may have hit the road without saying goodbye.

Tucson, AZ, 1965: When Gretchen Fritz and her sister Wendy leave for a movie and never come home, police must infiltrate the tight-knit world of Speedway teens to discover the disturbing truth behind the girls’ disappearance.

Austin, TX, 1966: A rain of bullets descends on students and faculty at the University of Texas. But when the smoke clears there remain more questions than answers: who could have done this evil, hideous thing? And why?

San Bernardino, CA, 1964: When Lucille and Cork Miller's car crashes, Cork burns to death inside. Half the evidence suggests it was an accident, but could Lucille have wanted her husband out of the picture?

San Bernardino, CA, 1964: When Lucille and Cork Miller’s car crashes, Cork burns to death inside. Half the evidence suggests it was an accident, but could Lucille have wanted her husband out of the picture?

1934: Eric Madison is found dead in a boarding house at the back of the Warner Brother's lot. But in an age where propriety is paramount, will the punishment fit the crime?

Gretchen is a wild child - beautiful, blonde, and impulsive - but Wendy is a goodie-two-shoes. In a town known for its delinquents and runaways, the Fritzes must accept that their daughters may have hit the road without saying goodbye.

Tucson, AZ, 1965: When Gretchen Fritz and her sister Wendy leave for a movie and never come home, police must infiltrate the tight-knit world of Speedway teens to discover the disturbing truth behind the girls’ disappearance.

Santa Cruz, CA, 1970: Police respond to a blazing house fire and are shocked at their discovery – three adults and two children are found ritualistically bound, shot, and drowned in their own swimming pool.

Los Angeles, CA, 1968: It's a temperate evening in the L.A. Castilian apartment complex, but something is amiss inside the adjacent parking garage.

Kansas City, MO, 1953: Bobby Greenlease has been kidnapped. When the largest ransom payout in history fails to bring Bobby back, St. Louis' shadiest characters must track down the culprits.

Money and influence allow the Greenlease's to keep the FBI out of the case, but when the largest ransom payout in history fails to bring Bobby's safe return, it will fall to the hands of St. Louis' shadiest characters to track down the culprit.

Julie died of antifreeze poisoning, and the police are suspicious of her husband.

The police are trying to narrow down the suspect list for Bill McLaughlin's murder and wonder, was the dead man's son responsible?

24-year-old Vietnamese-American Thien Minh Ly is found stabbed on the Tustin High School tennis courts and police think his strange friend Craig is a suspect.

27-year-old Jarrod Davidson is shot dead outside his apartment in Santa Barbara, California. Next to him is a suspicious potted plant. He was in the middle of a nasty custody dispute but the DNA doesn't match his ex-wife. So who killed him?

After her husband dies suddenly, a woman becomes the relentless target of her overly flirtatious neighbor. When her brother moves in to protect her, he's put on a collision course with the neighbor that will only be resolved with bloodshed.

Get a sneak peek and watch original audio and video footage that was recorded during the neighbor disputes. The all-new series premieres Monday, April 14th at 10/9c. Only on Investigation Discovery.

Neighbors go to war when an older man obssesses over the boundary lines of his property and wont let his neighbors anywhere near it.

In the rolling hills of Lenoir, North Carolina, retired Vietnam veteran Roland Younce sells off a patch of his land to Tony Moore and his young family to build their forever home on. Unfortunately, things turn ugly.

In peaceful Alden, New York, Helena Sindrewicz and husband David Ward have built the house of their dreams right beside Sindrewicz’s childhood home. Her brother Andrew still lives in the family home where he tends their ailing mother, Anneliese. All is well between the neighboring siblings until their other brother, Raymond, returns after many years away and moves in with Sindrewicz. Old tensions and grudges erupt between the brothers, and things get ugly, threatening, even physical. When Sindrewicz finally decides to sell the family home out from under Andrew, he brings their civil war to a shocking, fiery conclusion.