In the third year so far of my fortress with 115 population...with only 48 losses so far!
So, when starting the game I had a mayor who was an immediate suspicion, being 270 years old and having grey hair and pale skin. Soon enough, dwarves started being found drained of blood. This dwarf was a legendary weaponsmith, armorer and blacksmith. So, I let him feast a bit while farming him for masterpiece gear. In the end, after equipping my milita with full steel gear, I locked him away and convicted him with 4 murders, 5 witnesses testifying and another 14 unconfirmed murders alone. A small price to pay. However...
After locking him away (the mayor, electable official), I've bricked him in a small 1x1 dark square while in a cage completely isolated from the entire world.
I'm having a bit of a problem now where they keep electing this guy, despite being eternally sealed from society under 5 feet thick brick slate walls and not even talking to anyone or doing interviews. Normally, this wouldn't be a problem, but liasons and other alliances keep wanting to talk to him. How do I get my dwarves to stop electing the ghoul?
Anyways, here's a tour.
The Eternal Mayor:
Entrance:
1st Level:
2nd Level 1/2:
2nd Level 2/2:
3rd Level [under construction]:
The Boneyard:
Would destroying the wall immediately let the elected ghoul out of the cage? Not sure if anyone knows.
I don't think you need to kill him. You can assign him to a chain instead of a cage and if the chain is in his office I'm pretty sure he can still do his mayoral duties without killing anyone. If you put a workshop nearby he might be able to still craft stuff for you while serving his sentence, but I'm not 100% sure of that.
What about when his sentence is over? They only gave him a couple months, sadly.