You may be wrong is assuming that they’re not speaking.
Just because sources aren’t named doesn’t mean that sources don’t have names.
The FOX reporters have said time and again that their sources are rock solid. Can’t get much more solid than eyewitnesses.
After watching Herridge & Rubin report, I’m guessing they’ve got a lot of info, but unless their sources ARE rock solid, they’re not putting it on the air. Herridge knows a lot more than she is/can put out there with those standards - if her demeanor the last time I saw her is any indication, she was fighting to look professional, but you could see her disgust with the situation/info she’s getting leaking around the ‘edges’.