It seems killing the thugs that are attacking Kester the distiller counts as +1 Murder, -1 Good, -1 Law. Clearly a bug.
(The Murder variable affects how Mercykiller characters respond to you, so not 100% irrelevant).
Also, it seems defending yourself against the guy who attacks you when you enter the building right next to the execution site also earns you a Murder increase. (IIRC this is also true in "normal" Curst). Not sure if that's a bug or not, but I'm iffy on that one because just about every other such situation in the game either lets you back off through dialogue, or if the dialogue gives you no choice, then it's self defense.
PS. What tools do you use to make changes to the game, anyway? Infinity Explorer 0.85 can't even open that area, and besides, it doesn't seem capable of /editing/ anything, just viewing.
Edited by Markus Ramikin, 20 December 2014 - 02:19 AM.