I agree, poachers all the way. That first pic that you call 2 fawns looks like a momma deer and 1 fawn. Look at the belly on the one, I would bet dollars to doughnuts she's still producing a little milk. The second pic is definitely a buck with the horns cut off. I'd say he was following momma when all three got picked off. Are there any fields nearby? Chance are they were shot from a distance and then brought in there to be concealed. Maybe they weren't finished getting what they wanted when they got chased off. Who know, maybe they heard the yotes and got the jitters and got out. That's when the yotes finished them off.