What Was The Point Of *This* Lockdown?

On Halloween, my school was put into a lockdown because the sheriff's department had received a call that someone with a rifle was wandering along the levee--and our school backs up against the levee. But in the case of this story, what's the point? The kid had already shot the people he intended to shoot.

From CNN.com:

One dead in Tennessee school shooting

Sheriff: Student suspected in shooting of three administrators

Tuesday, November 8, 2005; Posted: 6:30 p.m. EST (23:30 GMT)

JACKSBORO, Tennessee (CNN) -- A student opened fire Tuesday afternoon on a principal and two assistant principals at a high school in Jacksboro, Tennessee, killing one of them, the sheriff said.

The suspect was taken into custody, authorities said.

No students were injured, and Campbell County Comprehensive High School was locked down immediately after the shootings, said Judy Blevens, director of Campbell County schools.