Teen Accused of Murdering Parents, 3 Siblings in Oklahoma Says It Was Only the Beginning of a Planned Killing Spree: Report
07/24/2015 AT 09:40 AM EDT
Bever was taken into custody together with his 16-year-old brother, who is not being identified because he is a minor, early Thursday morning, just an hour after police received a 911 hang-up call that led them to the grisly scene.
When authorities arrived, they heard moaning inside the home and forced entry. Inside they discovered the five victims, all of whom had been stabbed to death, as well as a 13-year-old girl who was taken to a nearby hospital in critical condition. She is expected to recover. Another 2-year-old girl was found in the home unharmed.
Police spotted Bever and his brother running out the back door of the home as they arrived on the scene. They were chased down by a K-9 officer and arrested on suspicion of murder.
Altogether, nine people lived at the home – two parents and seven children, four boys and three girls. Both parents, David Bever, 52, and April Bever, 44, are dead, as are two of the boys, ages 12 and 7, and one of the girls, age 5. The victims were all found in different areas of the home.
On Thursday evening, officials told KTUL that they had received a full confession from Robert Bever and said that he showed no remorse as he admitted to stabbing his mother, father and three younger siblings to death.
Authorities also told the station that Bever claimed the murders were "just the beginning" of a series of killings planned outside the family. The extent of these plans remains unclear.
At a briefing on Thursday afternoon, Corporal Leon Calhoun of the Broken Arrow police department revealed that authorities had recovered multiple weapons from the scene, including various knives and a hatchet, according to KTUL.
"There was several different types of weapons that were actually used in the homicides," said Calhoun.
He also noted that Bever "looked to me like he had a smirk on his face" in his mug shot.
"I just don't know how if he's even comprehending what has happened or if he is really, is so removed that he can't feel remorse. It's unknown."
A neighbor told PEOPLE on Thursday that the home had always had a "sketchy vibe" to it, adding that she rarely saw the kids outside.
"They're very reclusive," the neighbor said. "The kids don't come out of the house."
Police have not yet established a motive in the killings.
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