Policeman - end of Active Shooter

I am working from the end of the Active Shooter scenario. The last character you see is the police arriving on the scene. In order to connect it to John's existing material, the quest is connected to the message telling you to Hide when the front door is chained shut.

To complete the scenario:
* Go to class, talk to the professor (most NW room)
* Go to the entrance, click the door
* Go hide (most NE room)
* Go back to the entrance, talk to the police.