Make a copy of the a destroy script, and then edit it.
Here's what I would do:
;Artificial Intelligence Script
;Header
desc = Fade Out Disappear
;Triggers
:state=0:state=1
:state=1,alphafadeequal=100:decalphafade=0
:state=1,alphafadeequal=0:state=2,destroy
:State=1,hudimagefine=YOURPATHTOTHEIMAGE, Plraddhealth-99999
;End of Script
Don't blame me if it doesn't work. I'm not good at scripting.
Well, the main point of that script is if the NPC dies, it will load an image you made (For example: Part of team has died!), and then the player would die.