30 years ago I was hunting with a guy who shot what looked like a whitetail excpt that it had a perfect 4x4 mule deer rack. Other than the antlers it didn't look like a hybrid except a very faint black tip on the tail that you couldn't see unless you were holding it. It didn't matter to my buddy since he had tags for both species, except we didn't know which tag to throw on it. We took it to the local F&W office and asked which tag should be used but they just told us if we shot it as a whitetail to use the whitetail tag, or vice versa.
My guess is it was a whitetail. Hybrids are extremely rare....strange antler configurations not so much. I've seen several whitetails with forked racks and vice versa. I doubt any were hybrids....just deer with weird antlers. You tag it for the tail...that's the true indicator. Not unusual for a whitetail to have a small black tip on its tail. Everyone wants to think the saw or shot a hybrid but the truth is, you likely didn't....they are that rare and stories of their existence and most often just that....stories.
Kind of scary that nearly 1/4 of the people thought the OP's deer was a whitetail.......


















































