It's never nice to read a story about murder. The fear felt by the victim and the callous, cold blooded nature of someone taking another person's life. Or a serial killer that goes on a murderous rampage, slaughtering countless victims for money, or just for pleasure.
It's just that person who is sick, right? I mean, you wouldn't be able to convince other people to join in? Well, these families did. That's right, families.
Together these six families had their own reigns of terror, finding and murdering victims.
They say families should be close and work together, but these families used their unbreakable family bond to commit the ultimate crime, murder.
6. Dan and Ron Lafferty
The pair murdered their own brother's wife and child in a frenzied attack, as they both believed they were Prophets sent by God.
Eldest brother Dan was excommunicated from The Church of Jesus Christ and Later Day Saints for attempting to take his 14-year-old stepdaughter as a second wife. After he was kicked out, his five brothers began to listen to his teaching, that they were all prophets and they began to grow beards and long hair.
The group also wanted to be polygamous and take more than one wife. Ron's wife refused, and left him. Filled with rage he placed his anger with Brenda Lafferty, the wife of his youngest brother Allen.
An ex beauty queen and well educated, Brenda was outspoken, and had openly supported Ron's wife decision to leave him.
Believing God told them to do it the brothers broke into the house Brenda shared with their brother and slashed their throats with a ten inch knife.
Brenda was found on the kitchen floor, baby Erika was found in her crib.
Bizarrely it looks like eldest brother Dan isn't finished with his killing spree and has said that the recent deaths of a whole family in Utah is all his fault, despite him being locked up in jail with a life sentence.
Recently a family were found dead in their home by their eldest son, apparently all drinking a liquid laced with drugs.
The Strack family had been close to killer Dan Lafferty who they had visited numerous times in prison, and loved his teachings about '1000 year sex romps' in heaven and an impending apocalypse.
Although the family hadn't spoken to the murderer since 2008, he thinks his teachings pushed them to suicide.
Speaking from his prison cell, religious nut Lafferty said;
"My insanity messes with people's lives. It's just the way it is."
I'lll miss them, but I'm happy for them. I believe they're in paradise now."
5. Sawney Bean Clan
The inspiration for the Wes Craven movie The Hills Have Eyes, the tale of Sawney and his crew is a gruesome one.
Sawney and the others populated their group by incest, and thought there was nothing wrong with cannibalism - preying on vulnerable travelers who were passing the clans sea cave, nestled on the edge of Scotland.
With the community terrified at the disappearances, and of the body parts that were washing up on the beach, King James IV sent over 400 men and a pack of bloodhound dogs to trace the missing people.
When stepping inside the cave, the men vomited and were repulsed by the scene they were faced with.
The dried bodies of humans dangled from the roof, piles of stolen goods and money from the victims were piled next to the pickled limbs of dozens of people.
Here's the trailer from the movie Sawney and his family inspired, The Hills Have Eyes.
4. The Briley Brothers
Maybe people should have seen the Briley brothers coming. Eldest brother Linwood had already committed murder by 16, after he shot an elderly neighbor just because she was in range from his bedroom window.
When caught he simply said; "She has a heart condition, she would have died soon anyway."
The brothers went on a killing spree in Richmond, Virginia in 1979 that lasted seven months before their arrest, terrifying the community.
After serving just a year for murder, Linwood, his two younger brothers and accomplice Duncan Meekins started their terrorizing crime spree that included robbery, attacks, rape and murder.
They used vile killing techniques such as crushing a teenager's skull with a cinderblock.
Over the seven months they wreaked havoc, and no-one was safe from them. They claimed 10 victims that included the elderly, a pregnant woman and her five year old son.
Their final two victims managed to get away, escaping from a blaze the brothers ignited in their home using gasoline.
3. The Bloody Benders
America's first known serial killer family, they murdered guests at the inn they owned in Labette County Kansas from 1871 to 1873.
The family were followers of the new Spiritualist movement, with daughter Kate often performing seances to entice guests and show off her psychic abilities.
They were not short of guests, and the family business was booming. However rumor has it that the four were not actually related as they claimed, but were giving the illusion of being a family so they could carry out their crime wave.
But people started to get suspicious. People who were staying at the inn were not making it to their final destinations, with people just vanishing. This included a very famous local doctor, William York.
The people of the town started a search party, and when they came to the inn, it appeared that it had been abandoned. The family had left, but had left behind sickening evidence that showed just what had been happening to the guests at there.
Behind one chair at the guests dinner table was a trap door, with a foul stench emanating from it and it was covered in congealed blood. The grounds of the inn were inspected, one patch of recently turned over soil was dug up and the remains of William York were found. His throat had been slashed and his skull crushed.
He wasn't the only victim to be found, the bodies of two children, one of which had been buried alive were also discovered.
A man who had stayed at the inn called Mr Wetzell came forward and said that he and his friend had stayed there, he had heard a rumor that the family liked to chop people's heads off as they sat at the dinner table.
When Mrs Bender offered him a seat that was placed in front of a curtain, he politely declined the chair. This made Mrs Bender angry, and after a few moments the two men of the family came out from behind the curtain. This was the spot where the trap door was hidden. No doubt Mr Wetzell had saved his own life by refusing the chair he was offered.
So why would the family murder all them people? Money? The thrill? We will never know.
2. The Middle Class Murderers
In the picture above Inessa Tarverdiyeva, 46, shows police how she shot her victims. Along with her second husband Roman Podkopaev, 35, and two daughters Viktoria Tarverdiyeva, 25, and 13-year-old daughter Anastasiya they all plotted together to kill a total of 30 victims.
Inessa admitted to murder saying it was "a way to make money" and that she "is a gangster by nature."
In one 2009 murder, the gang murdered paratrooper Dmitry Chudakov, his wife Irina and son Sasha, 7, with a semi-automatic weapon before daughter Veronika, 11, was knifed 37 times.
On a separate occasion the family gang tortured and killed two teenage girls, one believed to be the goddaughter of Inessa and gouged out their eyes. They even murdered police officers, simply because they needed more firearms.
Searches of the family's homes revealed an 'arsenal' of 20 firearms, including automatic rifles, grenades, shotguns, silencers and ammunition, as well as items stolen from their victims.
The gang used walkie talkies to communicate during robberies, and were excellent at knowing the whereabouts of the police.
The family was finally brought to justice in their home city of Russia after several years of extortion, robbery and cold blooded murder, all to feed their own greed.
1. The Wests
Fred and Rose West looked like your average couple. They had four children, plus Fred's daughter from a previous relationship and lived in a modest home. But the depraved, cruel, sadistic crimes that went on behind the door at 25 Cromwell Street is a crime that shocked Britain like nothing before.
Fred and Rose West spent years coaxing young women into their home, by picking them up while they were hitchhiking, or offering them a job as a nanny to their young children. These girls never suspected they would be walking into a house of horrors.
Used for the pair's sadistic pleasures, they would rape and torture the women for their own sexual gratification, and when they grew bored they would murder them. Fred would then bury the bodies in the walls of basement, or in the garden.
Rose, at Fred's request, was a prostitute working from home. Fred had a peep hole in the wall and enjoyed watching his wife have sex with other men, just as she enjoyed watching Fred rape and torture their victims. Fred also consented to Rose having sex with her own father, who often came round to have sex sessions with his daughter.
The couple's victims even included their own daughter Heather. Rose had already killed Fred's daughter Charmaine several years earlier and buried her, a crime Fred was aware of, and seemed fine about.
Their eldest daughter had already fleed home after repeated sexual abuse from both her parents, so the attention went to poor Heather. After she complained to friends about the abuse, the couple murdered her.
When they buried her body they began to threaten their other children saying they "would end up under the patio like Heather." These threats, and the fact that Heather was nowhere to be seen, sparked the interest of police, but it wasn't until Fred had filmed himself raping another of his daughters, who then complained to a friends mother who went to police, that the crimes of 25 Cromwell Street came to light.
A media frenzy began, and no less than the remains of 10 women were found on the property. Fred hanged himself in his cell before he went to trial. Rose continues to live out the rest of her life in prison.