No. They don't have every member in a central database, not even at the branch level.
This doesn't mean that he is in the clear. He will be found out by Elders asking around and deductive reasoning. They will narrow it down. What Language congregation? What Circuit? What Side of town? How did you meet? What does he look like? Do you have any SFW pic's? FB or Insta?
I hope nobody is underage :-/ There may be criminal charges. (even for selfies, it has happened)