I'm sure that they will check his known associates, but there will be some that will still help. I'm sure they will ultimately find him, but it may take a while. It may not. And I feel certain that in the end, he will die for his deeds. Probably quite violently.
Can you imagine how the ex-girlfriend is feeling? Having been raped and kidnapped, and held for three days. Then hearing he has gone on this rampage, knowing she had probably at one time enjoyed his company. Oh wow. I wonder if he has children somewhere, if police are going to see them, family members, etc. and giving them protection. It seems no one would be safe.
You were a DA? Asst. DA? Where?