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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 down.

Killer Siblings

Lunas

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

Bruces

Residents of quiet Noel, Mo., 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.

Agofskys

In the fall of 1992, two brothers terrorize a California community when they embark on a two-month crime spree that includes three brutal murders and many more near-death attacks.

Romero & Self

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.

Polands

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.

Youngs

In this bizarre Midwestern saga; a grudge between a shady district attorney and an eccentric local student turns deadly; investigators work for decades to bring a quartet of brothers to justice.

Rogers

An immigrant family's American dream turns into a nightmare when a devious sister manipulates her younger valedictorian brother into committing murder; a dark family secret comes to light.

Suhs

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

Fryers

A missing persons case spirals down a winding path once detectives learn that a formerly beloved older brother appears to have embezzled money from the family's business; his siblings are hellbent on getting revenge.

Hawes

Telling the twisted stories of some of the most maniacal siblings in history through exclusive interviews and firsthand accounts.

S2 E3 | Suhs

E11 | Lunas

E10 | Bruces

E9 | Agofskys

E8 | Romero & Self

E7 | Polands

E6 | Youngs

E4 | Rogers

E3 | Suhs

E2 | Fryers

E1 | Hawes