On Fri, 6 Dec 1996, Aaron Ziegler wrote:

   Then, Nabiki heard a crack, like a twig snapping. Her vision
darkened, and she realized that her neck had been broken. It was
painless, not at all a bad way to die, she supposed. Her last
thoughts before darkness overwhelmed her were of Ranma and little
Midori. Please take care of her, Ranma.
                         *    *    *
   Tears streamed down Ranma's face as he slowly lowered Nabiki
back onto her hospital bed. "I've never hated you," Ranma said
again, "But justice had to be served." He gently closed Nabiki's
unseeing eyes. Your soul can rest easy, now, Akane, Ranma thought
bitterly. Though I doubt mine ever will.
   Ranma glanced at the child cradled in his arm. Almost as
though she had sensed her mother's death, Midori had awakened and
begun to bawl again. Ranma rocked the baby gently, and eventually
she returned to a fitful slumber. Midori, he thought, I hope you
don't come to hate me for what I've done, much as I may deserve
it. And I hope that you never have to choose between justice...
Ranma looked sorrowfully at Nabiki's still form, ...and love.
 The End

Isnt the ending a little bit extreme?  Nabiki was only a victim not 
someone who premeditated the killing.