Merriman closes the cabin door, careful not to shut it too loudly. His attention is on Wellard, so he does not entirely notice Jack's quick move to close the chest save to note the change in position.

'Not shooting, Mister Wellard,' he says, keeping his voice low as he moves further into the cabin. 'He was attacked with a knife, and left unconscious on the floor. You were found outside the room, also unconscious. And Captain Sparrow sent Miss Lennox to find a doctor for Mister Norrington, and proceeded to bring you out here.'

It isn't accusatory, not in the least. It is a simple statement of the facts as he knows them.