I may be a diabolical bastard for knowing this, but there is a way to kill any Sim, no matter how much they care to resist.
Build a swimming pool and remove the ladder after he or she starts swimming. The unfortunate Sim will eventually tire and drown.
Hey, thanks for the tip, Tim, and you really are a diabolical bastard, though I like that in a person.
Regrettably, I’m so inept at The Sims that I’ve yet to build a complete roof on any house in the neighborhood. You want me to build swimming pools? Half the houses are either on fire or abandoned.
I’m telling you, the place looks like Camden on a full-moon night in July.