My biggest face palm moment.
Vamp #1, kill attempt 1
I got my first vampire migrant yesterday and locked him in a room by himself for "science", then surprisingly he gets elected mayor, while in a room with no door or any other way out in the basement of the trade depot and never having met anyone. So I decided to try and drown him not realizing they cant drown, cut a hole in the ceiling, designate it a pool, and have dwarfs drop buckets of water on the vampires head and leave it at that. Suddenly Dwarf McFarmer has been found drained of blood! Turns out the vampire climbed out the hole in the ceiling when his room filled with water and escaped to start feasting on my dwarfs (funny thing is the first dwarf he killed was actually a candidate to be vampire #2, proving the 2nd guy was not a vampire). This time my dwarfs actually wittiness the attack and the hammerer arrests the guy just before he finishes off another victim. So he was sent to prison.
kill attempt 2.
So now the vampire is in jail, while he is there I put him in his own squad, and give him station orders onto a draw bridge, then dismantle the rope, while telling all dwarfs to go to the alert station. Once the vampire gets on the bridge the lever is pulled, the vampire goes up a whole 1 z level and falls back down again with only minor injuries. But now he wont pay attention to station orders and he wanders off to another bridge. Once he is on the bridge I have my dwarfs pull the lever again! Nada, the bridge is not hooked up yet. Attempt 2 is an abysmal failure.
kill attempt 3.
Out of options with him still ignoring station orders I decide to have him attack a caravan guard, which he surprisingly does, and wins with no problems. I was hoping it would trigger a loyalty cascade with the caravan and the caravan would tear itself apart (yay free stuff!) while killing the vampire. Well, nothing happened, and now the guy is ignoring ALL orders, but the annoying liaison is still following him around. So after he runs into the corner I give him an order to attack the liaison thinking he wont do it (because he is ignoring everything else). So... he attacks the liaison, and kills him. NOW the loyalty cascade begins! With my own fort.
Suffice to say, 1 dead guard, 1 dead liaison, and many dead dwarfs later I savescum. Caravan must have had a nice show as the riot went down.
To add insult to injury, the vampire survived.
Save corrupted. Goody.