The police lied when they said the "offender" was shooting at them with his weapon. When it was discovered to be unfired and on safe their stories changed a lot.
I know cops don't want to go to jail just like everyone else, perhaps more so. However they are human and make mistakes too. The way the world is they are held accountable for the rest of their lives for mistakes made in an instant. Therefore they have an overwhelming incentive to not tell the truth if they think they can get away with it.
You have to wonder if the weapon was found on safe why would the "offender" point it at anyone? Certainly he was well trained and taking it off safe would have been one of the first things I would have done. Before pointing it at someone I was going to shoot anyway.
When the enforcers of justice can't be trusted to tell the truth they should not be doing that job.
Proxima est Mors, Malum Nullum adhibit Misericordiam