Students encourage their peers to say something if they see something in a video posted February 21, 2018, on the school's Facebook page.

The day before, a video was posted on the Dalton Public Schools Facebook page after three students reported they found a threatening note in the floor of a classroom.

In the video, the school's principal, Steve Bartoo, also encouraged students to speak up if they see something suspicious.

Wednesday, February 28, 2018, a teacher at the school barricaded himself in a classroom. The teacher, identified as Randal Davidson, shot a window at the school. 

This happened two weeks following the school shooting in Parkland, Florida, where 17 students were killed.