Betty Cooper: Ms. Grundy showed up in Riverdale a year ago, out of thin air. There is no record of her before that. Her Facebook, her LinkedIn account... they were all created a year ago. Before that she's a ghost, she doesn't exist. The only "Geraldine Grundy" I could find was a woman who died seven years ago.
Archie Andrews: Where did you find all this?
Veronica Lodge: The deep web, the dark internet. Check it, it's all online... simple Googling.