The doofus who called the police, assuming it MUST be something nefarious going on, didn't contact appt management to see if the person should be in the appt.. That was the initial overreaction. Then when the police got involved; Gung-HO! guns guns guns.
Justice Antonin Scalia said so hardly a year ago. "You are kidding yourself if you think the same thing will not happen again," when talking about Korematsu v. United States to some law student at U. Hawaii.