Thanks to all for suggestions and replies. I keep coming back to posted signs on park property. Pets must be leashed. Clean up after pet. Fine $100. The man was an adult child. Not following, not complying. Gonna do what ever he wants.
Now, lets just imagine four more pets like this. Next day six no leashes. And on.
This is how it falls apart. Sad.
You hear of rapists, thieves, and drugged up monsters having charges dropped for their assaults. Why even have police? Is this the defund police coming real?
I am not in park with my dog ever now. I am learning to trust no one on my short walks.
Just be careful out there.