Sebastian Villasenor, an 18-year-old high school senior from Ontario, California, faces five counts of attempted murder and one count of attempted criminal threats.

Villasenor was arrested with multiple firearms and over 1,000 rounds of ammunition, and was planning an attack on Ontario Christian High School around the 25th anniversary of the Columbine shooting.

The planned attack was foiled due to a classmate's report to school administrators, leading to Villasenor's arrest before any violence occurred.

Despite Villasenor's lack of prior disciplinary issues, he struggled to form relationships with peers and had become fixated on the Columbine incident.

The suspect is being held without bail and is scheduled for arraignment on Feb. 15 at the Rancho Cucamonga Superior Courthouse.

In response to the thwarted attack, Ontario Christian High School is reviewing its security protocols, while the legality of the firearms found has not been publicly addressed.

Law enforcement and school officials stress the importance of community vigilance and the critical role of reporting threats, as exemplified by the classmate's actions in this case.

The San Bernardino County District Attorney's Office highlights the need for public reporting of active shooter threats to prevent potential tragedies.