Investigations into the death are ongoing.

12:48, Fri, Mar 13, 2026 Updated: 12:54, Fri, Mar 13, 2026

Emergency personnel at the scene

Emergency personnel at the scene (Image: ABC NEWS/KMGH)

A boy who is just 11-years-old has been taken into custody – facing a first-degree murder charge for the death of his little brother. The five-year-old was found dead in Centennial, Colorado, US, on Tuesday. Arapahoe County deputies responded to the child’s death at a home in the 5200 block of South Jerico Street at about 5:30pm, sheriff’s officials said.

The boy's cause of death is still under investigation, the sheriff's office said. The 11-year-old has been taken into custody and is being held at the Marvin W. Foote Youth Services Center in Centennial, the sheriff’s office said.

A cordoned off street in Colorado

The street, in Colorado, was cordoned off (Image: ABC NEWS/KMGH)

“Our hearts go out to the family of these two young boys and to everyone in our community who is grieving this loss,” Arapahoe County Sheriff Tyler Brown said in a statement.

“Cases involving the homicide of children are among the most difficult our deputies and investigators face.”

Arapahoe County Sheriff’s Office spokesperson Anders Nelson called it a “very complex investigation,” reports the Denver Post.

“Everyone involved has been identified, and there is no danger to the community,” the sheriff’s office said in a statement on social media.

“This is an open and active investigation, and updates will be shared as they become available.”

Limited information is set to be released by investigators since both the suspect and the victim are children.

Emergency services vehicles in Colorado

Emergency services vehicles attended the scene in Colorado (Image: ABC NEWS/KMGH)

Due to the active police investigation, the school district has not identified the five-year-old who was killed.

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Timberline Elementary Principal Mary Bowens said in a letter to parents on Wednesday: “It is with great sadness that I want to share with you that one of our Kindergarten students has died unexpectedly.

“There is currently an active police investigation and law enforcement asked the District not to release the student’s name.”