Crusader Kings II
You have to check your save game file . Open it with notepad and search the characters name and the ID will be there .
But there's a way to make the ID's show up in your tooltip during a game .
Got it off the Paradox forums . Not sure if it's wrong to post a link to it but here
Read the user Falon's instructions on it .
It worked for me.
Hope that works for you. While I've never used that command to kill anyone I have used the charinfo one to quickly change between rulers using the chars id# and a different console command so I can either help them out or accept a marriage request that they normally wouldn't accept. Stuff like that.
Also there is a topic right here called Console Commands and I would have a look at that. It's where I got all of the commands I use, there is another topic with the cheat events in it. Though I am unsure what it is called now and since one of the updates to the game some of the cheat events don't work 100% properly now but are still quite useful.
[Edited by powergrind, 5/30/2012 12:29:18 PM]
[Edited by powergrind, 5/30/2012 12:32:35 PM]
[Edited by powergrind, 5/30/2012 12:33:15 PM]