How might things have been different when an armed man, intent on confronting an educator, walked into Frederick Douglass High School this month if Baltimore City Schools Police were allowed to carry guns on duty? As fate would have it, we know exactly what would have been different: Nothing. Douglass’ school police officer was unarmed at the time of the shooting, in accordance with state law. But his two supervisors were there, both were armed, and it didn’t stop the intruder from shooting special education assistant Michael Marks twice. Nor did the fact that the two supervisors were armed ever come into play; all three school police officers rushed to the school lobby after hearing gunshots, but none drew a weapon while bringing the assailant into custody.