11-Year-Old Charged with First-Degree Murder of 5-Year-Old Brother

Authorities say the suspect is in custody at a youth detention center in Colorado

Mar. 12, 2026 at 2:33pm

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An 11-year-old boy has been charged with first-degree murder in the death of his 5-year-old brother in Centennial, Colorado. The Arapahoe County Sheriff's Office responded to a home on Tuesday evening and determined the suspect was the victim's brother. The 11-year-old is currently in custody at a youth detention center and faces a charge of first-degree murder. The investigation is ongoing, and authorities say there is no danger to the community.

Why it matters

Crimes involving the homicide of children are among the most tragic and impactful for a community. This case has shaken the Centennial neighborhood and raised questions about what could have led an 11-year-old to allegedly commit such a serious act of violence against his younger sibling.

The details

According to authorities, the Arapahoe County Sheriff's Office responded to a home in Centennial around 5:30 p.m. on Tuesday. Investigators determined that the 11-year-old suspect was the victim's brother, and the case is being investigated as a homicide. The sheriff's office said the suspect is in custody at the Marvin W. Foote Youth Services Center and faces a charge of first-degree murder.

  • The incident occurred around 5:30 p.m. on Tuesday, March 12, 2026.
  • The sheriff's office announced the arrest of the 11-year-old suspect just after 2 p.m. on Wednesday, March 13, 2026.

The players

Arapahoe County Sheriff's Office

The law enforcement agency that responded to the incident and is leading the investigation.

11-year-old suspect

The brother of the 5-year-old victim who has been charged with first-degree murder.

Marvin W. Foote Youth Services Center

The detention center where the 11-year-old suspect is being held.

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What they’re saying

“Our hearts go out to the family of these two young boys and to everyone in our community who is grieving this loss. Cases involving the homicide of children are among the most difficult our deputies and investigators face. Our team is fully committed to a thorough investigation, and we will continue working tirelessly to determine exactly what happened.”

— Sheriff Tyler Brown, Arapahoe County Sheriff

“The little boy was so sweet. He would come over and ask my son for help to fix his scooter. He was so little and so cute. One of those people you just want to hug and help.”

— Louise Ramirez, Neighbor

What’s next

The judge in the case will decide on Tuesday whether or not to allow the 11-year-old suspect out on bail.

The takeaway

This tragic case has shaken the Centennial community and raised difficult questions about how to address violent crimes committed by children. It highlights the need for comprehensive support systems and early intervention programs to prevent such devastating outcomes.