Who leaked the Jack Layton story?

While many in the media and from the left have hurled wild accusations against the Conservatives, who really leaked the Jack Layton bawdy house story?

Here's what Jonathan Kay, reporter from the National Post had to say on Twitter:

    For those who care, someone tried to shop me the Layton-massage story 2 yrs ago (without docs). It was a Liberal fixer

    To repeat: I have no idea who leaked the Layton/massage story this time around. But, if had to *guess*, I'd say the most desperate party

    Michael Ignatieff was *not* Lib leader when Layton story was shopped to me by Libs. They shopped it to me on Oct 12, 2008.

Apparently the Liberals tried to leak it last election to save Stephane Dion. This doesn't prove anything, but shows people need to be more careful throwing wild accusations around, especially those with the media. Could easily have been Liberals.

UPDATE: The plot thickens.

    Interestingly, the October 10 2008 Liberal Access-to-Information request includes alleged massage visits in 2003