“shared a social media account with him, including personal photos and videos posted on the platform, in order to build trust" -- I wonder if these were real photos and videos, or AI fakes. It's crazy how many fake profiles Instagram pushes into my feed lately, and how many people probably don't even realize they're fake.
A common method is just taking somebody else's publically posted photos, with light editing on top. I imagine you can take them from sources that can't be reverse searched easily, like Facebook groups, or these days probably as frames from tiktoks, etc. That is to say, for some things, you don't really need GenAI.