So how does (did) a special inquiry like the one that was performed on Feynman work? It looks like publications were searched and people were interviewed, but d

So how does (did) a special inquiry like the one that was performed on Feynman work? It looks like publications were searched and people were interviewed, but does anyone know how those searches were prioritized? I've googled a bit and haven't been able to determine if there's any established procedure that doesn't rely heavily on the discretion of the officials performing the investigation.