Advise?

I had the law call me yesterday and ask "mr. Blackwell are you missing a dog?" Shocked I said everything I own is at the house as far as i know unless one got out of the pen. The officer said well then can you explain to me why I have a dog here w your name and number in a place nobody is to be hunting? I said now do what I'm telling you every dog I own is at my house I have a handful of ppl you can call that will tell you every one of my dogs you can come and see. I then asked what the dog looked like she said he's a big red dog w a block head all cut up w a green collar that has your name and number on it. Shocked I told her I have one red dog but it is a gyp and everything else is yella or brindle. I haven't had any green collars in years. Finally I got off the phone w the officer who was still not convinced that wasn't my dog and I wasn't poaching.

Well I got to thinking and I give a big red male to a man I use to do some hunting w 4 years ago. I called that mans son and asked if he still had the dog. He says naw daddy give that dog to a boy last week or so. So I ask what kind of collar that dog wore and told him the situation. He didn't know for shure but said yeah dad has some of your old collars here I think and the boy he give the dog to does a LOT of poaching in the area. I know who hunts the ranch next to where this dog was found and called him to see if he knew anything about it. He says somebody has been poaching his place aswell they've been trying to catch them for a month.

Now I have this 18 yr old boys name and number who is responsible for all of this on one hand I can handle this quietly and many he can learn a lesson. And on the other hand I have the law still wanting information from me.... How would y'all handle this situation?