shell-shocked

PTSD in its rawest form is a death sentence which causes many veterans and others to execute themselves in hope to be free.

And often the worst thing wasn't the victims--they were dead, after all, and beyond any more pain. The worst thing was those who loved them and survived them. Often the walking dead from now on, shell-shocked, hearts ruptured, stumbling through the remainder of their lives without anything left inside of them but blood and organs, impervious to pain, having learned nothing except that the worst things did, in fact, sometimes happen. (Mystic River)