I find it quite interesting how all those posters who said something along the lines of 'nothing happens without my approval' or 'I'm the commander, I make the calls' have gone awfully quiet recently.
If this incident does indeed reveal the PiC was, at least partially, responsible for the forceful eviction of Mr. Dao, those words may well come back to haunt them.
This incident may well result in a thorough, and much needed, clarification of how and when responsibility passes from ground to cockpit.