The others make a good point - you don't skin and dump a pet dog that dies of natural circumstances.
Alright, if you wish.... I suppose somewhere, in some place, someone may do this. But it is unusual, to say the very least.
I only live about 15 miles from Gary, and while I don't know him personally, I know that the area he calls home is changing. Many people are moving in from outside of what was once a tight knit community. The fact that the hound was unceremoniously left on a back lot, skinned for the vultures to devour should raise the hackles.
I suggest again, that under these circumstances, it be reported.