Yes, he's a gorgeous whitetail deer!
This 8 pt. buck was born with a condition called melanism, an unusual high concentration of melanin (dark color pigment) which occurs in the skin, plumage, or fur of an animal. The opposite of albino.
As mentioned in the article from NorthernAmericanWhitetail.com:
Bobbie Fain did shoot a big semi-melanistic whitetail on a guided hunt at Rancho Encantado in Dimmit County in 1997. However, this ranch lies far outside the normal area for melanism, and Bobbie’s trophy appears to have been an isolated case. Ranch owner Jack Brittingham says he’s seen no other “dark” deer on the property since he began managing the land in the early 1990s, though he recalls having observed some deer of “toffee” color.