I've read that Peterson saw Cruz carrying the duffel bag toward the school, knowing exactly who he was and the warnings about him, and he still did nothing. This is beyond shameful.
If this it true, it would be utterly bizarre in at least two big ways.
First, there are conflicting reports on this but my understanding is that the retard punk had been expelled from the school at the time of the shooting. If Peterson, being the so called campus security officer, saw Cruz on the grounds, obviously he should have approached him to ask why he was there. For what purpose? You are no longer a student here.
Also, what kid brings a duffle bag to school? That should big red flag to anybody. Even out of common curiosity any adult should ask him why? What's in the bag? Especially someone calling himself security.
To sum it up, there was an expelled student on campus walking into the classroom building. He had been seen by security carrying a duffle bag. And nobody thought this may be a little bit strange? Nobody, including Peterson, thought they should stop him and ask him why he is there (since he has no business being there) and what is in the duffle bag?
With all the tips to the School/the FBI/the Police about this kid, combined with the duffle bag on campus, the entire scenario as a whole is simply absurdly unbelievable. When you add that the Sheriff Deputies were hiding and refused to enter the building, you couldn't write a story like this. You couldn't make it up.