Grewal did not keep Harper informed

From Macleans, we learn that Harper knew nothing of Grewal's sting, or at least Grewal was allegedly criticized for keeping Harper in the dark in the Tory caucus meeting:

If indeed this was a sting operation, as Grewal maintains, he was told Harper should have been informed from the outset and the negotiations carried on far longer than necessary to obtain incriminating evidence

(Of course this could be providing Harper with plausible deniability, too.)