Would you fire your dogwalker in this situation?

My neighbor 2 doors down, is an ex-con who does not make the best decisions at times. Last month he walked the dog to a near university,he took him off the leash, and then dog nearly got hit when running into busy street.
I have leashes, there are leash laws, and our mayor in our village wrote a nasty newsletter about dogs. They have called animal control.
Now Maynard is a good dog, but walker said he he darted in front of a car. I again repeated, as usual, use a leash. My dog loves him. He has issues, lack of respect, authority, disrespect for law, and also a firecracker. I’m scared of his rebuttal if I let him go. A kid could safely walk my dear mutt around the block. I wish I could, but discs have me out of the game.

Why doesnt he listen??