When did it become a sting (pt. 2)?
As has been much discussed on this blog and elsewhere, one of the underlying questions is at what point Grewal decided to turn his encounter with the Liberals into a 'sting'. Below, I suggested that the fact that Grewal prefers to talk to Dosanjh in Punjabi (even when Dosanjh tends to opt for English) suggests that he did not yet think that non-Punjabi speakers would have to hear and understand the tape.
Another consideration points in the same direction. As is now known, the Conservatives have released a second version of the tape of Grewal's meeting with Dosanjh and Murphy. There are 15 minutes that are different between the two tapes. One of the differences is between the two is how they begin. The new tape (hopefully now unadulterated) begins with 30 seconds of dead air. The old tape begins with Grewal's voice saying "Meeting with Mr. Ujjal Dosanjh (Health Minister) and Mr. Tim Murphy (Chief of Staff in the Prime Minister of Canada's Office) on May 17th, Tuesday, at 1:00 pm." (click)