The gunman who burst into a Northern California library and shot two people dead — while also injuring a child — has been identified.

Authorities named the suspect as a young man with a reported obsession with the 1999 Columbine High School massacre. A chilling graduation photo shows him in a red gown and cap, smiling during his high school ceremony, in stark contrast to the violence that unfolded.

A disturbing video clip from the scene shows a figure standing over a person on the ground, consistent with witness descriptions of the rapid attack inside the Butte County library.

The teen suspect was confronted by law enforcement shortly after the shooting began. Police responded quickly following a 911 call filled with screams and gunfire.

This tragic incident has left the community reeling, with many questioning how a recent high school graduate could carry out such a targeted and brutal attack in a public library.

Investigators are examining the shooter’s background, online activity, and any potential manifesto or warnings, particularly given his reported fixation on Columbine.

The names of the victims have not yet been publicly released. One of the injured is a child.

The investigation remains ongoing as officials work to uncover the full motive behind the horrifying attack.