I'm going with Red Wolf,because;
A the coloration,head shape,ear set and size are correct.
B there has been a population in far East Tx since being re-introduced by TP&WL more than 50 years ago.
C. They were indigenous to Eastern Tx until exterminated under a government bounty program in the 1800s
D. Ray Roberts Reservoir has suitable habitat and so does Haggerman Wildlife Refuge. Haggerman is so well patrolled it would be perfect for a reintroduction program.
E. A friend of someone my BIL know's

ath::liar:shot one about 20 years ago while deer hunting on Caddo National Grasslands because he thought it was a pretty coyote. When this un-named individual unrolled the pelt in a taxidermy shop,the taxidermist looked like he had seen the Grim Reaper and yelled "get that *@%$#%thing out here,that's a Red Wolf and we could both go to jail if the authorities find it here. I'm amazed the game warden's antenna didn't go up and refer you to the head shed so TP&WL biologist could have a look and possibly do a little research in the area. By all means post pictures if you are lucky enough to get more. He's a handsome fella.