Did he lose his ability?
After he got shot in the head did he lose his ability?
My clue is the letter thats is all about the <<past>> now and that there are no more visions of the future until the end of the movie
I've read this here too but I don't see why he would? John clearly only had a grazing wound from the shot.
Very confusing scene in the hospital. She says: "I spoke to the chief surgeon. He said the surgery was a success. - Good. - He said the bullet went clean through."
Do they mean that Charles the killer is still alive? So that John hasn't killed anyone and isn't "doomed" to continue his work?
Maybe the letter was more about the past because he made peace with what he done?