>Unlikely, if you don't treat enemy turncoats well you won't get any more of them. Sun Tzu wrote about this.
True. But it depends on how many people were aware where the defector went. "Three may keep a secret if two are dead".

Some turncoats aren't worth the hassle of keeping.
https://www.nbcnews.com/news/world/north-korea-expel-us-soldier-travis-king-crossed-border-rcna117553