It seems clear that even before FG started deleting stuff, his digital footprint was extremely minimal. It may be a reach but based on his age (around 30), I find this very odd. Part of this might be because in my job, I research a ton of people thoroughly (the people are sometimes involved with youth activities, so we basically want to know everything about them before even considering hiring them.) A lot of the stuff you find were not things they placed online by choice, but just random things that they're email address was associated with, maybe their phone number, address, etc, just random little footprints they've long forgotten about. Often trivial, non-interesting stuff, but its there. Maybe they bought a pair of sneakers on a message board--something.
FG is confirmed to have actual family members sharing his last name that are in the area--if he did not I would almost suspect that this is some type of new name/identity. With that not being the case, just putting it out there, if someone were a predator it would make sense that they would want the tiniest digital footprint imaginable. It just seems "light", even compared to other people around his age that barely know how to use a computer.