Cops suck. They make snap judgements about civilians all the time. Not all are very good at what they do and the poor ones give the rest a bad name. I'm still waiting to meet a good one.
If the shoe was on the other foot (given my personal experience) that student carrying a gun would've been tackled by several officers, experienced several broken ribs, likely been tasered 7-10 times and booked if he made it to jail alive. Then the prosecutor would go ahead and press charges. No possibilty of recourse for the student, lawyers won't touch this stuff. (Pretty much what happened to my brother, but he didn't have a weapon and was only 120 lbs).
Law enforcement is above the law. And that is a major problem. I'm white and I have been wronged by law enforcement, I can only imagine how minorities are treated. There needs to be an enforcement task force to police the police IA isn't getting it done. If Kansas cops are this crooked imagine Chicago's police force.