Olivarez said the officers who arrived at the school quickly might have been shot had they attempted to take out the gunman alone. He said,

The active shooter situation, you want to stop the killing, you want to preserve life, but also one thing that – of course, the American people need to understand — that officers are making entry into this building. They do not know where the gunman is. They are hearing gunshots.

They are receiving gunshots. At that point, if they proceeded any further not knowing where the suspect was at, they could’ve been shot, they could’ve been killed, and that gunman would have had an opportunity to kill other people inside that school.