Plausible deniability for Liberal MP Shawn Murphy?

In my September 17th post (bumped with updates to the 18th), Possible electoral improprieties by Charlottetown Liberal MP Shawn Murphy?, I reported on having received an MP mailer from Murphy's office - 9 days after the writ was dropped - that was not marked with the requisite authorization from his official agent.

This morning, CBC-Radio Charlottetown reported on the story. Apparently this mailer was still arriving in mailboxes as of yesterday, 11 days after the writ was dropped on September 7th. The matter was referred to local Conservative Party lawyer Jim Travers. Murphy's office responded by saying that the mailer in question was delivered to Canada Post on Friday, September 5th - the last business day before the writ was dropped - and that the delivery time from Ottawa fell within Canada Post's unaddressed admail guidelines.

Of course, a busy MP like Murphy could not possibly be expected to keep up with all the news, especially trivial little matters like his own party leader's launch of the Liberal Party campaign in Edmonton - on Friday, September 5th no less.

UPDATE: The story's now up at CBC.

UPDATE: And now at The Guardian.