The premise is that this investigation team was seen by the entire country as a fair party to conduct an investigation and reach a conclusion. Now that the conclusion is not what the news media was suggesting all this time, there's all kinds of skepticism and wanting to see the work.
This is an echo of 2016 again. The news media alluded to an entirely different election result, the result was the complete opposite, and slowly everyone started to question how the media could be so wrong again.
It seems like everyone's standard for truth is "if reality contradicts the media it means something is being hidden" as opposed to "the media was wrong because they are bad at this"