Nowhere.
Not only because it's barely got season one but because it's a finished story. It went full circle. And Falco closed it in-game.
You can ask the Captain about it, to which he responds he of course knew David, since the kid was from his area.
And he contacts you with Falco. You know, one of the two survivors.
That is how the story ends. With him, and presumably Lucy, moving on.
