And how do you know that he was thwarted by PP’s security? He apparently went all through the building but didn't manage to harm anyone inside. The bank was nearby, the grocery store was nearby. Certainly both businesses had people coming and going. Where are those interviews?
The locked rooms; the bullet proof glass; all of their security measures and training have been reported on.
There have been interviews of the people at the grocery store; one describes the person coming in having been shot, blood all over his face.
The rest of their story is along the lines of “we were not allowed to leave the store.”
They don’t have a story to tell.