At the end, Flynn says they should all sign the form and signs it. After the camera angle changes, he signs it again.
When we see the sniper's view of the platform the judge was standing on, it is clear that the bullet that went through the judge would have ended up buried in the platform and not in the pool as we are shown.
Once determined there's been a shooting and people scream and run, a catering server takes the time to place her tray of food down on a table instead of running for her life.