I didn't see the fight but I'll tell you one thing. If Jacare was going hard for the take down, and had Roger clearly in trouble, off balance, and they were advancing off of the mat due to momentum (and usually a little help from the guy in trouble as he favors going out of bounds).....then Jacare clearly gets points for a takedown. That is HOW it works. It's not necessarily if he takes him down in bounds.
You can look at the win in the ADCC superfight of Arona and Kerr, when Arona won their bout in the exact same way, with a takedown going out of bounds.
And you can look to the ADCC fight between Saulo Ribiero and Jeff Monson, where i think Saulo won in a similar fashion.
there is history and precedence on the side of the Jacare decision if that is how he took down Roger