In the Richmond school case, the teen gunman fired several shots into a side door of the school to gain immediate entry. Later police caught up with him and exchanged gunfire inside the school. No law enforcement officers, staff or students were struck. Authorities said the teen, Brandon Clegg, later shot and killed himself in a school stairwell.
Hoschouer said the glass film delays entry by a few minutes, if the perpetrator persists, giving police time to respond and prevent entry.