And another free piece of legal advice: Do as you're told.

Neighbors have not turned over the dog in question. They claim they can't find the dog. There was more than one they were ordered to turn in and they tried to claim brother's wife did something to the two dogs they did not turn in, however they "found" one of the dogs. Sheriff has, in turn, informed them that they have until a certain time to bring the other dog in.

Okay so I actually have two bits of legal advice: first, keep your animals contained. If your animals get out of your yard/house, you are responsible for every bit of trouble they cause. This is the first time I've encountered a situation where the dog was more than just an annoyance (at worst). If you can't keep your dogs contained, you need to figure something out or rehome them. I'm sorry, that's how it is and I have been on the other side of that. It sucks.

The second is if Law Enforcement tells you to do something, do it. That's not the place to argue or fight it, you take the matter to court. Don't say anything to your neighbors, don't post anything on social media, don't smart off to law enforcement, just do what the cops say and contact a lawyer. Refusing to comply only causes more problems for you, especially if a clear violation of some kind is evident.