It was obvious that he didn't have control. I felt like "did I miss something?" when they initially called it a catch.
You can see why, the reft who had that responsibility was looking at the spot where he was down, thought he had secured it going to the ground and then it popped out as he moved in to mark it. Ball probably looked like it popped out late.
Good use of replay, good reversal, very bad play by Dez. Lost in the hysteria is the fact that it was a 4th down play and he should have caught it rather than go for the TD as if it was a game-ending hail-mary. Dallas should have easily had it 1st and short going in for the TD.