All that can be done is to brace for the storm if justice is dispensed[...]
As both are vampires and both are guilty of some murder or another, I vote have the militia deal with them[...]
I would wait (*), they are bound to visit again. But there is also a possibility that none of them is the culprit - that you have your own vampires. It seems strange to me that they would be able to kill someone so quickly. Normally vampires need some time before they are thirsty after arrival, about three months.
Well those are pretty drastically different suggestions, aren't they
! One vote to kill 'em both and brace for the fallout, and one vote to be extra-cautious and confirm that it's even one of the two visiting vampires.
Splint, it's very tempting, but it would be strictly last-resort since I'd really like to avoid war with the humans if at all possible. Though I see your point about killing them both regardless of which killed the child. If I do kill one outright I might as well kill both. I'd still like to convict the right one in the justice screen if possible, though.
On that matter, Saiko Kila, I'd say your point about taking some time to find a victim probably points to the law-giver, since she's been there since last season and the guild rep has only been there for under a month. I guess it might be possible that there's a vampire among my own, but I haven't gotten migrants since autumn and it's summer now, so I'd have expected to find a body sooner than this (well, I've found bodies, but not from vampires
). Maybe one of the scholars or performers I've gotten lately is also a vampire, but I don't see any other vampires looking back through the announcements.
I'm starting to think I should wait them out, convict the law-giver in absentia, retire the fort once it's stable again, hunt them down in adventure mode to slay them both, then retire my adventurer in the fort and unretire the fort. It would be a fun little quest-driven adventure, probably. Is it even possible to convict visitors that are no longer on-site, though?
Also, general question, are there any actual consequences for unsolved murders in forts? Bad thoughts about it from relatives maybe? I don't see anything in the wiki about downsides of not convicting for crimes.