Billy and his partner in crime do kill somebody...yet I can't remember who.
There is a murder in bat boy as well...does the Dr not kill Edgar?
In WSS, Bernardo kills Riff which spurs Tony to kill Nardo.
In JCSS, Judas also falls to his death (doesn't he?).
In SFANW during "one more step" the wife falls off the ledge to her death as well.
Edward Hyde kills nearly everyone in J&H. "go to sleep, my tormented love.."
I'll think of others eventually....
"Applause begets applause in the theatre, as laughter begets laughter and tears beget tears."
CLAYTON HAMILTON, "Theory of the Theatre"
"I think theater ought to be theatrical ... you know, shuffling the pack in different ways so that it's -- there's always some kind of ambush involved in the experience. You're being ambushed by an unexpected word, or by an elephant falling out of the cupboard, whatever it is."
TOM STOPPARD