After they were done eating, Miguel finally asked something that he was curious about.
"Right, how did you know that information broker in Swine Bar?"
At this point, Miguel had already more or less guessed that the information broker was problematic. She was privy to information that even the Red Family was not aware of.
From the looks of it, it seems that she has some connection to the mastermind that he has been searching for.
He already knew that the mastermind has the skill to manipulate and control a massive amount of people. This was the best skill to obtain information without arousing any form of suspicion. Hence, Miguel thought that the Swine Bar information broker should be someone connected to the mastermind behind the scenes.