We'd be fools not to expect them to.
So what is it likely to be? And when?
I suspect it will be late enough in the campaign so that the few journalists remaining who care about such things won't have time to look into anything too deeply. After all Harper won't care if it's discovered after the vote - he'll be able to pass another retroactive law exonerating his state police of any wrong doing.
They could barge into some all candidates meetings and march out the LPC and/or NDP candidates in handcuffs while muttering empty phrases about 'terrorism' and 'suspicions'. Again best done right before the event so that no curious journos, if there still are any, could look into it.
They will do something. They are Harper's police force and will do as they are instructed.