There were police in Parkland and in Douglas High School. If memory serves they did nothing. If there had been a police officer in the school and he/she was as competent as the rest of the force appears to have been then there's no reason having them on site would have done anything.
What you said was objectively not accurate.
Not sure what the point of you playing games is.
From what I understand, there was some sort of cop there. Not sure if he was armed