Tick anything you already have, in any order. Quests unlock once this is done.
Newspaper archives, county records, the original interview. Nearly every famous account traces back to something you can actually read, and that is the interesting part.
Search newspaper archives2 things left above. Quests are real things you go and do, so they only make sense once you have what you need.
First one waiting: Trace a famous case back to its earliest source