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FBI Investigated Colorado High School Shooter’s Social Media Before Attack, Failed to Identify Him

The FBI investigated Desmond Holly's extremist social media activity for two months before the shooting but lacked probable cause for arrest, authorities said.

  • The FBI investigated social media accounts related to a 16-year-old before a shooting but did not identify him or take further action.
  • The FBI confirmed it opened an assessment on an unknown user discussing a mass shooting but found no probable cause for arrest.
  • The federal investigation failed to identify Desmond as the shooter, and no law enforcement action was taken before the attack.
  • The Anti-Defamation League alerted the FBI to Desmond Holly’s accounts, which were linked to the shooting.
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Denver PostDenver Post
+7 Reposted by 7 other sources
Center

Evergreen High School shooter grappled with victim before final shots, witness says

Desmond Holly, the 16-year-old Evergreen High School shooter, physically grappled with one of his victims before shooting the teenager at an intersection behind the school, then shot himself as law enforcement closed in, a man who witnessed the encounter told The Denver Post on Tuesday.

·Denver, United States
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Center

EVERGREEN, Colo. (KTLO)--There is new information regarding the investigation into the Evergreen High School shooting that left two students injured and in critical condition. It has now become known that the FBI has seen some alarming posts online that link to the person responsible for the shooting that occurred in July. One of the posts mentioned how the young man had a fascination with mass shootings. However, federal agents did not connect …

·Colorado Springs, United States
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KMGH broke the news in on Monday, September 15, 2025.
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