How can I complete Law and Order without starting a new game?

I would like to resume an old Awakening save, but on loading I discovered that I must have triggered the Smuggler's Run/Law and Order interaction "bug".

The bartender's "open the passage" dialogue was activated after both Law and Order and Smuggler's Run quests were active, resulting in the player being able to kill the smuggler leader but Aidan and the guards think I murdered the Lieutenant.

I don't want start a new game. Is there any otherway to get around this so that I can complete the Law and Order quest? (e.g. by using the console?)

1. runscript zz_coa_debug does not provide any useful options.
2. runscript zz_getsetplotflag set coa000pt_smugglers 21 0 does not appear to help, even after a reload or leaving Amaranthine and returning (this requires zz_getsetplotflag.ncs in packages/core/override). Flag 21 appears (by inspecting the Awakening designerplots.erf to be the flag set when you kill the Lieutenant.
3. Aidan's current dialogue, "I've nothing to say to you.", does not appear to have a CONVERSATION_LINE_COND PLOT triggering on a particular flag so perhaps some additional processing has caused the current state.