Some sort of canine mix.
Someone probably bred it and when it peed on the floor they turned it out to fend for itself....or maybe just because it didn't turn out cute enough.
When was the last time you saw any kind of evil mutant beast animal other than in a movie? sheesh!
Some people need a reality check. It may have been dangerous or viscious because it had been let run wild but that means there is most likely some person somewhere who is at fault unless this somehow happened from a wild canine of some sort giving birth to it in the first place.
Simple DNA will tell them exactly what kind of canine or canine hybrid it is. This is simply news hype to call it some sort of unidentifiable beast. It may be a never before seen cross of a fox and a dog or a coyote and a dog or simply a mutation of some common breed of canine. Just because it may be a hybrid, mutation or deformity doesn't mean it is some sort of Sci Fi Evil Mutant Demonic Creature and I can't believe people are that silly to think that way.
It was probably hungry and neglected most of the time. Looks like it had skin problems maybe and needed vet care or to be put out of it's misery rather than people thinking it was something evil.
It certainly shouldn't have been left to run wild and be a danger to pets and children...any dog that is left to go wild can become dangerous. Domestic dogs that become feral are way more dangerous than actual wild animals because they don't have enough fear of man and will approach children, pets, houses etc.
I do think it looks odd but is still some sort of domestic dog or wild canine mix.