Paiken may have been referring to this?
The federal lobbying commissioner has dropped her high-profile investigation into Apotex founder Barry Sherman—and the Liberal fundraiser he hosted for Justin Trudeau—because she says there is no point in continuing the probe now that the billionaire drug maker is dead.
Barry Sherman's death cuts short the lobbying probe against him - Macleans.ca
Perhaps, but the impression I had was that it was a criminal investigation of some kind, and not the lobbying probe. Paiken seemed to intimate something more serious than the lobbying probe iirc. But the tweet isn’t around anymore, so I can’t give more information unfortunately.