What if they are correct, and stumbled onto the same trail the FBI has, and the FBI gave them an order to not discuss it anymore due to a pending investigation with national security repercussions?
Given how BB has just walked away from this article - no rescinding, no nothing, I think it's a possibility.
The requirement of perfect secrecy and vast involvement in a lie is what typically weakens conspiracy theories as not realistic.
And media has held back articles several times due to govt request - maybe this one just got through.
Not saying I'm right - only saying it's possible.
It would be obvious if the results were opposite what Cook said publicly, or if the investigation was suddenly stopped and made inconclusive.
Apple would also be counting on the US government and Bloomberg to not leak "the truth" so that Tim Cook's statement would not be revealed as a lie.
The idea offers intrigue but doesn't pass any kind of reasonable pass of consideration.