I stand corrected. It was a legal lateral according to reports.
Edit: Nevermind. Saw the article where the NFL VP of officiating said it would've survived a review given a lack of indisputable evidence to overturn. Personally, I think that's a load of shit and doesn't necessarily mean that the in game official would've "seen" the same thing on review. As I understand it on those types of plays, it's not where the player's body is at the time but where the ball is released and caught. After seeing the video of the play, I maintain that the ball was released at the 32 and was caught by Bell at the 33. IMO, it's about as irrefutable as it can get.