That’s right. Unless it’s clear and obvious that the dirtbag had a weapon, keep your mouth shut. Even if the dirtbag does have a weapon, say nothing except to point that out. You want the cops to know you saw it. If possible, take a picture of the cops picking it up off the dirtbag. That’s your ticket out. Ask them for the serial number. They probably won’t give it to you, but ask anyway.
Make sure you have a “drop gun” handy.
Better yet, just let your dog out if you find someone in your yard.