Better have a serious talk with little Beau, Tal.:laugh:

Before I call the police, I go to the nearest store and ask them to page the owner of (car description and license plate number).
I'm usually successful in locating the owner.
Sometimes the owner is appreciate of being paged.
More often the owner is dismissive, sometimes belligerent.
Some people don't deserve to have a dog.

When greyhounds are adopted out, the new owner is given their racing muzzle. Unless the owner knows the dog well enough that their "racing instinct" is gone, they should always muzzle the dog when around others. There was an incident last year where a group of greys were let loose in a fenced area with a hill. They were all running around and one of them tripped going down the hill. The rest of the greys attacked the downed dog and that dog needed multiple surgeries. The owner of the kennels where these dogs were being kept obviously didn't think to put the muzzles on. This is NOT to say greys are dangerous to other dogs. It depends on the grey and their prey instinct. My first grey had absolutely no prey instinct and could care less if a rabbit sat on him! When I first got my second grey I was told she was cat friendly. One day in the yard my cat ran and she went after her and pinned her up against the fence. I screamed "NO" and ever since then she has never gone after another animal, even rabbits. (Greys are very sensitive to negative behavior toward them and they want to please).
Point of all this is that hopefully Beau will have a friend to run with without being in any danger, as long as the owner knows their grey is safe without the muzzle.

I applaud your compasion , but generally abuse based on ignorance I would go
with a beating.