Trudeau knew. BBC:
Speaking to reporters in Montreal, Mr Trudeau said his government was told about the arrest a few days beforehand, but it did not play a role.
Bolton knew. NPR:
News: @AmbJohnBolton tells @NPR of the arrest of a Chinese tech exec: "I knew in advance. That is something we get from the Justice Department." This means Bolton knew, at least in general terms, of the pending action as he joined Trump and Xi for dinner at G20. @MorningEdition
— Steve Inskeep (@NPRinskeep) December 6, 2018
So the question is of course: did Trump? At the time Meng was arrested, Trump and President Xi were having dinner.
There’s a hearing in Vancouver tomorrow morning.