An Oklahoma teen who stabbed his parents and three siblings to death escaped execution Wednesday after accepting a plea agreement.
Robert Bever was sentenced in Tulsa County District Court after pleading guilty to the July 2015 killings, which he is alleged to have committed with his brother Michael, 17.
Prosecutors gave him the chance to plead guilty and accept life without parole in the hope that it would spare his surviving sister Crystal, 13, from being forced to relive the horror in court, The Tulsa World reported.
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![Killer: Robert Bever (seen second from left in February 2016), 19, pleaded guilty to killing his parents and three siblings last year, and is now serving life in jail as per a plea agreement](https://cdn.statically.io/img/i.dailymail.co.uk/i/pix/2016/09/08/02/51bCj80hVn19db279f1176c971f5-3778573-FILE_In_this_Tuesday_Feb_23_2016_file_photo_Robert_Bever_second_-a-24_1473298193764.jpg)
Killer: Robert Bever (seen second from left in February), 19, pleaded guilty to killing his parents and three siblings Wednesday, and will escape the death penalty per a plea agreement
![Family: Robert (seen in red shirt) killed Daniel, 12 (far right); Christopher, 7 (far left); and Victoria, 5 (center, in pink). His 13-year-old sister Crystal (second left) survived, and two-year-old sister Autumn was not harmed in the attack](https://cdn.statically.io/img/i.dailymail.co.uk/i/pix/2016/09/08/03/380B1FAE00000578-3778573-image-a-26_1473300011917.jpg)
Family: Robert (seen in red shirt) killed Daniel, 12 (far right); Christopher, 7 (far left); and Victoria, 5 (center, in pink). His 13-year-old sister Crystal (second left) survived, and two-year-old sister Autumn was not harmed in the attack
Tulsa County district attorney Steve Kunzweiler said Bever's actions were 'savage' and that he 'deserves the death penalty.'
But, he said, 'a death penalty prosecution would result in his teenage sister being forced to recount and relive the brutal details of the carnage that her brothers wrought again and again.'
He also said that the plea deal meant that the second survivor - Autumn, aged two - would be able to grow up free of the shadow of the killings.
'The toddler sister, who mercifully was asleep and did not witness the horror, would grow up learning details of the carnage in repeated court hearings that could easily stretch into her teen years or beyond,' Kunzweiler said.
Michael Bever, who is alleged to have helped his brother carry out the killings, pleaded not guilty at his arraignment. His trial is scheduled to begin next year.
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Victims: Parents David and April were also killed. Prosecutors offered the life imprisonment plea agreement so that Crystal would not be made to relive the attacks repeatedly in court
The Bevers were accused of killing their parents, David Bever, 52, and April Bever, 44, and their siblings Daniel, 12; Christopher, 7, and Victoria, 5, in a middle-of-the-night rampage in suburban Tulsa.
Detectives who testified at a preliminary hearing in February said the brothers detailed to officers a gruesome plot to carry out further mass killings across the country after killing their family.
'They wanted to kill at least 50 people, they wanted to be famous. They wanted a Wikipedia page. They wanted media coverage,' said Detective Rhianna Russell, who had interviewed Michael Bever, in that hearing.
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ShareDetective Eric Bentz testified that Robert Bever lamented that their plan failed and 'everyone didn't die like they were supposed to.'
He also said Bever was 'laughing or chuckling on several occasions' as he described their plans.
The detective said that Robert Bever expressed a desire for notoriety for being a serial killer, and that he'd planned to kill the family, cut up the bodies and store them in bins in the attic.
![More to come: Michael Bever (left), 18, is accused of helping Robert (right) in the attacks, but pleaded not guilty. His trial is scheduled to begin next year but he is now refusing to cooperate with doctors who are trying to perform a mental health examination](https://cdn.statically.io/img/i.dailymail.co.uk/i/pix/2016/09/08/03/380B1FBE00000578-3778573-image-m-36_1473300948768.jpg)
More to come: Michael Bever (left), 17, is accused of helping Robert (right) in the attacks, but pleaded not guilty. His trial is scheduled to begin next year
The duo then planned to west in the family SUV armed with guns, ammunition and makeshift bombs to randomly attack other locations and kill ten people at each place, he said.
There was also a plan to make a pair of videos - one with bodies visible for the police and prosecutors, and a second one without the bodies that would be shared online.
'If he killed one person he was one person, that evened it out,' Bentz said of Robert's motivations, while 'if he killed one more than one person, that would make him like a god.'
By many neighbors' accounts, the Bevers kept to themselves - the siblings played alone in the backyard and walked down neighborhood streets bunched together, and their parents didn't socialize much.
David Bever's former co-workers at a local IT department described him as a quiet man.
![Killer: Robert wanted to be a serial killer, cops said, and planned to travel around the US, attacking places at random and killing ten people at a time](https://cdn.statically.io/img/i.dailymail.co.uk/i/pix/2016/09/08/03/380B1FBA00000578-3778573-image-m-37_1473301047783.jpg)
Killer: Robert wanted to be a serial killer, cops said, and planned to travel around the US, attacking places at random and killing ten people at a time
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