Well, I did kill Rayic...and after checking my inventory (against the goods I should have recieved from him after looting--I've sold nothing so far), it would appear that in some random resurgence of religious ethics (playing a paladin), I neglected to pilfer his corpse.
This is probably the missing trigger I mentioned earlier, as Jermien mentioned nothing about the crimes or Kova, and Kiyone brought nothing up about them.
I will try to reload a save prior to Rayic's death, in the hopes of finding this note. Fortunately I didn't do many other quests (unless you count scouring the entire city map for evidence :-) ) since I wanted to gather the evidence first--and thusly avoid, or in some cases limit, the many nasty encounters with knights, thieves, and enforcers (although the thieves are a great source of potions
I hope this is simply a silly mistake on the player's part, as bugs are annoying to correct and negligence is usually reversible (except when it leads to death ,
Thanks again. One day, when I am done or nearly complete with this mod, I will post a praise-laden review.