It looks a lot like some wolf-hybrids I had 20 plus years ago. They were a combination of Gray Wolf, Malamute, and Red Wolf (I believe I heard that the Red Wolf was originally indigeneous to the south-eastern U.S.). They were reasonable dogs, but the big male we had was a real handful and definitely had a mind of his own. The photos look like a really healthy animal, so my guess is it got away from someone. To me, the nose looks too short for a coyote.