Astounding lack of common sense

So, from this BBC report, it looks like there is going to be a blame laying argument over whether a school door was locked or not:

After crashing his truck into a ditch near the school, the gunman emerged and began firing an AR-style rifle at two people who were exiting as funeral home.

The suspect then jumped a fence and began firing "multiple, numerous rounds" at the building, Mr Escalon said.

As he approached the entrance to the school he "was not confronted by anybody", the ranger said.

According to Uvalde County Independent School District Officers protocol, campuses are required to have staff "who patrol door entrances, parking lots and perimeters". Teachers are told to keep doors locked at all times.

"We will find out as much as we can why it was unlocked," Mr Escalon said. "Or maybe it was locked. But right now, it appears it was unlocked."

 Yet the media has been full of photos of the school, like this:

I mean, seriously:  do they think a door is the only way into a ground floor classroom with windows?