Some reflections around esthetics/illustrations for the card game
For the witness and events cards I find film posters are a good inspiration, especially those of Laurent Durieux. The esthetics are good at drawing the eye to the key element of the story, while still conveying the broader context in an evocative way.
It can also apply to individual notable persons/ personas, as the perspective can still leave enough to the imagination
Collaboratively out what the key elements should be in the images can be a way to identify new entries into the cannon - in a social, fun way.