I guess that’s possible, but I didn’t get the impression from reading the post that the author was being deceptive in that exchange. He just seems a bit shocked

I guess that’s possible, but I didn’t get the impression from reading the post that the author was being deceptive in that exchange. He just seems a bit shocked and still cares about someone that is/was obviously important in his life. That seems like a more normal reaction to me than assuming he had a deeper ulterior motive of trying to get her to reveal something via text (which was already in the video evidence.) To me the tone of the post is more shock and disappointment, not legal scheming.