Sorry to hear that sad story about the kind woman who took somebody into her home because she was told "he's so nice and he knows it's the truth", then she gets murdered.....I bet they squashed this story in the hall and nearby areas because they don't want JWs to know they are in danger from their witness work.
You cannot be this trusting!!
I also realized back then that I could be in danger from the brother leading the car group. I remember criticizing somebody years ago because he thought he was going to stop us car load of sisters and pick-up some homeless guy he witnessed to!!... I told him "you better do this when you are alone..not with me in the car". I was furious about this.
Tragic stories like you related are more common than you might imagine in the Jehovah's Witness religion, buy they are covered up. Nowadays it is more dangerous than ever since many people coming into the religion in recent years have serious issues. Some are downright dangerous. Then, the clueless JWs who study with them imagine they are going to introduce them to the unsuspecting people in the kingdom hall.... Well...they are not introducing them to ME.
Even though I am not in the religion anymore and am just a spectator, it gripes me that stories like this are kept hidden from rank and file witnesses.... So, they go tripping merrily along and think they have angelic protection and walk head-on into treacherous situations OR are encouraged to be in close proximity to dangerous people all the while thinking - well..he/she is studying so it's okay... Umm, NO.
This is why I am glad I'm not there anymore.