Of course he did. The sad reality is that he has plausible deniability on this one. Contingencies are made but the decision wasn't made to execute the decision until the Saturday morning.
Everyone knows it- including the Parliament- but no one can do anything about it.
Again though, if he decided on a whim to shut the airline down on the Saturday morning then it shows an immensely flawed and dysfunctional decision making process at the exec and board level of Qantas.