Two brother killed their parents and three siblings, recorded it alll and planned to become serial killers.

Oklahoma brothers charged with fatally stabbing their parents and three of their younger siblings in a middle-of-the night rampage detailed to officers a gruesome plot to carry out further mass killings and laughed about how they killed their parents, detectives testified during a hearing Tuesday.

The hearing is for a judge to determine if there is enough evidence for 19-year-old Robert Bever and 17-year-old Michael Bever to stand trial on first-degree murder charges. 

During the hearing that Robert Bever expressed a desire for notoriety for being a serial killer and was 'laughing or chuckling on several occasions' as he described their plans.

Bentz said the teen told of a plan to kill their family, cut up the bodies, and store them in bins in the attic before taking the family vehicle as well as guns and ammunition to randomly attack other locations and kill ten people at each place.

Court room: Robert Bever, left, and Michael Bever, right, are escorted into a courtroom for Tuesday's hearing. Autopsy reports show the family members were stabbed dozens of times and died of multiple, sharp-force injuries

'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.

She said he indicated that they wanted to outdo known killers, and had mentioned the Columbine school and Aurora movie theater killings in Colorado in particular.

Authorities had previously said the brothers conspired to kill their family and that one brother had kept plans for a 'mass homicide' stored on a computer drive inside the home, but had not before given details.

Both brothers have pleaded not guilty in the July killings of their parents, David Bever, 52, and April Bever, 44, and their siblings Daniel Bever, 12, Christopher Bever, seven, and Victoria Bever, five.