Snapped: Killer Couples [OV]

When police are called to a seemingly routine domestic disturbance at a mansion in Louisville, Ky., a bizarre tale of he said/he said unravels as after one man reveals a body is buried.

As police in Tallah.assee, Fla., work to solve the case of a young father gunned down in his apartment, they find evidence of a deadly sexual encounter and uncover a vengeful plot.

The murder of a beloved schoolteacher takes detectives from Kentucky to Florida where an unexpected romance comes to light.

A small town in Washington is rocked after a local man is found shot to death in his home.

After a young man is found shot to death on the banks of a Georgia river, investigators trace the murder back to individuals who share his Gothic lifestyle.

A house fire in Louisville, Ky., sparks a murder investigation when detectives find two local men brutally stabbed to death.

An elderly veteran is nowhere to be found after his house suddenly bursts into flames in Tucson, Ariz., causing authorities to kickstart a nationwide manhunt.

After the remains of an elderly woman are discovered in Florida, investigators track down suspects with a complex family dynamic.

When a young man is found shot to death off the side of a rural in rural Indiana, the ensuing investigation delves into the dangers of online dating.

A 61-year-old farmhand is found murdered in his home on the outskirts of the Ozarks.

A father and daughter are reported missing after evidence of a bloody attack is found in their home.

A professor is found dead inside his Jeep in what appears to be a car accident in Tennessee.

An immigrant from Pakistan is found brutally murdered inside his Washington, D.C., pizzeria.

Texas police investigating the stabbing death of a mother uncover a bizarre scene: poisoned pudding, cell phones submerged in water and a bathtub rigged for electrocution.

When RV-lifestyle couple James and Michelle Butler go missing while camping along the southern coast of Texas, the discovery of human remains leads authorities to embark on a manhunt.

After a father is reported missing, a body is discovered in a remote Texan swamp.

Just one month before her wedding, a nurse is shot to death in a reported roadside robbery in rural Arkansas.

Hunters stumble across a young woman's decaying body wrapped in fabric, launching an investigation across several counties in Florida.

Patricia Aldridge and Mitchell Vickers

In the Los Angeles suburbs, a family is brutally attacked in their residence, leaving four dead and a mother clinging to life.