Of course not. He just follows the working plans given to him by higher management. If he cuts corners, he gets the blame.
But if those working drawings differ from the ones originally submitted for approval, they could be evidence that higher management, not the construction manager, were cutting corners, and that would be a sufficient reason to remove them.
Note: I'm not saying any of this happened, just pointing out where the argument is incomplete. Actually I dislike conspiracy theories because they are not "theories" in the scientific sense. That's because they are unfalsifiable because you can't prove a negative. If the conspiracy is exposed, then obviously there was a conspiracy. If not, that's just "proof" that the conspirators have succeded in covering their tracks.