The key questions will be, when did (media outlet) learn the initial reports were utterly false, and did (media outlet) continue reporting the initial narrative after learning it was false (and for how long). When they doxxed Sandmann and how they described his actions as facts came out will also be very important. The "juicy" stuff, though, will be the internal, non-public communications - how (media outlet) people spoke of Sandmann, especially as they learned he was the target of racial harassment, not an instigator of or participant in racial harassment.