So, I've just been playing through the Prisoners' Dilemma when a thought occurred to me. Eirama says that she and Zenmo would be hanged if the authorities found out about his shady dealings. So, why can't we bring Zenmo back but take him to Praetor Rongae? Or we could report Eirama to Praetor Rongae once she gives us the quest, wait a day for the Mercians to torture a confession out of her, and then be sent to bring Zenmo back so the Mercians can make an example out of him? Not sure what the reward would be though.