In hindsight, I’m sure they regret that they did not. However, they were first under the impression that it WAS a domestic situation. I’m sure this happens way more often than people even know, so there would be no reason to shut down a campus of that size (26,000 students) - it’s like a small city, if you think about it.
I’m sure this event will change how things are done in the future. Maybe they won’t be so quick to conclude what kind of “situation” they have, as they did here.
Even if their impression had been correct, their response was wrong.
Put yourself in that room. A gunmen has just shot 3 people. You're told it was a domestic dispute. He's believed to have left the building and no one knows where he is. No firearms were found at the scene so he's assumed to still be armed.
Are you really saying you wouldn't sound the alarm in that situation? I find it incomprehensible that they didn't warn people.