Killer Siblings Season 4 is yet to be announced by Oxygen

The ambitious Luna brothers take wildly divergent paths, one becoming a decorated army officer, while another rises in a Mexican cartel. When the brothers' worlds collide, a murder ultimately brings them all down.

Things get murky along the Tennessee River when a mussel distributor and his fiancée are killed by a trio of rough-neck brothers determined to steal a big payout and silence anyone that gets in their way.

Residents of quiet Noel, Missouri are shocked when the local bank is robbed in a brazen nighttime heist. The investigation takes a sinister turn when the bank's president is found dead and a pair of brothers suddenly come into a lot of cash.

In the fall of 1992, two brothers terrorize a California community when they embark on a 2 month crime spree that includes three brutal murders and many more near death attacks. Investigators work to stop the killer siblings before they strike again.

Two brothers pull off an elaborate scheme in the desert to rob an armored van of $300,000. When investigators attempt to track down the illusive robbers, the case becomes a homicide once the bodies of the two guards driving the van turn up. 

When the patrons of a rural bar are murdered execution-style, two determined detectives work to track down a pair of killer brothers and solve the most heinous crime in the history of the small town. 

When a body is found badly burned outside of Chicago, police work tirelessly to track down the killer of this young hardworking truck driver. The search leads them to an unlikely pair of teenage sisters who are able to evade police capture for years.

In this bizarre midwestern saga, a grudge between a shady District Attorney and an eccentric local student turns deadly. Dogged investigators work for decades to bring a quartet of brothers to justice.

An immigrant family's American dream turns into a nightmare when a devious sister manipulates her younger valedictorian brother into committing murder. When a dark family secret comes to light, it tears the siblings apart.

In one of the most tragic and brutal crimes in the history of the Great Plains, five teens playing by a campfire are ambushed when a trio of shotgun-wielding brothers targets them. A lone survivor bravely helps detectives hunt down her assailants.

A missing persons case spirals down a winding path once detectives learn that a formerly beloved older brother appears to have embezzled money from their family's business. His siblings are hell-bent on getting revenge.

When a correctional officer is murdered, it seems like an act of vengeance, but a love triangle is exposed; after learning his wife is having an affair, a husband plans to kill her lover and enlists the help of his brothers to carry out the task.

A pair of larger-than-life identical twins commit a series of brutal attacks in a small Tennessee town; with each crime, the brothers grow more emboldened; as time goes on and with little evidence against them, there's no telling how far they'll go.

Over a brutal 7-month stretch, a trio of brothers commit a series of increasingly violent crimes across the city of Richmond, leaving behind a growing body count; even after their apprehension, these brothers prove difficult to contain.

In the summer of 1991, a pair of half-siblings creates panic across southern California when they embark on a spree of random crimes of the worst kind, targeting people out doing everyday tasks.

After a man is found brutally murdered inside his own bar, a murder mystery unfolds over the span of years; detectives believe it's a business deal gone bad and must remain steadfastly dedicated to the case after hitting several dead ends.

The Carr brothers arrive in Wichita intending to commit robberies, but their plans quickly escalate to a murderous spree the likes of which Kansas had never seen. The reign of terror by the brothers is later known as the "Wichita Massacre."

Sheltered teen brothers Robert and Michael Bever idolized serial killers and dreamed of being the most prolific murderers in history. With an arsenal of weapons, their plan for notoriety begins at home in their quiet Oklahoma suburb.

Raised in a strict home, Matthew and Tyler believe it's their duty to cleanse the world of those living in sin; when two men are found dead, the brother's connection to them points toward a hateful trail of crime.

Twin brothers, raised with a deep disdain for law enforcement, are arrested for shooting a neighbor's dog, then escape custody and go on the run, leading to one of the deadliest shootouts in Colorado history.

When their brother is convicted of murder, three siblings hatch a deadly plot to avenge him by targeting the star witness in his trial. The plan goes awry when the wrong person is on the receiving end of their vengeance.