The more I look at this play on businessinsider it looks like defensive pass interference by New England. Maybe the game was fixed. It's not like Vegas would of lost any money had the Hawks won the game by 3 points right?
http://www.businessinsider.com/how-malcolm-butler-ended-up-with-the-patriots-2015-2
Another video which doesn't really show the interference. Bad angle:
http://www.businessinsider.com/how-malcolm-butler-ended-up-with-the-patriots-2015-2
Another video which doesn't really show the interference. Bad angle: