That seems like a strange string of events, all of which you are not to blame. Those officers screwed up big time and by the time they realized what they were doing, they tried to cover it up through intimidation instead of recognizing the mistake and stopping right away.
It seems odd that they werent more forth coming at the beginning and asked for your name or some other thing that would have made it obvious that you were the owner.
Odd is an understatement, 2&1/2 to 3 hrs after the call was cancelled. Not identifying
themselves once my dogs were barking at them was odd. Not turning on a flashlight
or anything, but just standing there in the dark in my front yard was odd. Not saying
anything until I came out of my yard and she was already trying to throw me to the
ground was odd. The other one trying to pick a fight with one of my tenants was
odd (by the way, that tenant was the voice of calm reason, to no avail, and also
happens to have a black-belt in Judo...would'a been ugly...). The threat to shot
my dogs through my fence, and then lie about it was odd. The assumption that
my sister was my lawyer (without asking her who she was) was odd. The
police then leaving without any charges being laid was odd. The
language being used by these uniformed officers, along with
their behaviour in general, was odd. Trying to taunt me into
trying to file a complaint, before they left, was odd. Yeah,
I aggree, odd does fit the whole situation. It was odd.