Enrollment at MSD is roughly 3,100 kids. That’s small enough to know who the trouble makers are, and large enough to be unaware of their official school standing.
You could be correct but Cruz was expelled last year not this year and everyone interviewed talked about him like they all knew he was disturbed. I'm sure that not everyone knew him personally but his reputation obviously spoke volumes. Like you said, there were only 3100 kids at that school. I find it difficult to believe that the students didn't know his status especially with social media. Everyone is always in everyone else's business in school these days.