Who's gonna bother with that? Unless you're talking poison, and sit back in safety and watch from a distance, for a lingering death (I mean, I assume you mean like torture?) you'd have to secure them, keep them there, wait for the death to occur. So much hassle. If you're gonna do it, bullet in the head, knife across the throat Jesus I've become a violent little ****er haven't I?
I blame you guys.
Disclaimer: Trollheart is not now, nor was he ever or has he ever been in the process of preparing to capture and/or kill any sitting or previous head of state. Please make those black helicopters go away; they're annoying the neighbours.