Hi Lost Mountain. Wow, that's a pretty frightening story and an interesting interpretation of why it's bothered you as much as it has to this day. I think I can understand what your fellow group member means though. You were abused and you had some pretty bad things happen to you. There was nothing you could do to help yourself, because you were only a child and there was no one there to help you. When you saw this girl, you saw a child who may have been in the same type of trouble or even worse. You saw a child who may have needed to be helped but there was nothing you could do to help her. You were powerless, just as you had been powerless as a child. You were powerless to save her from what very well may have been the same type of pain you were subject to. In that way, I can definitely see where you could have seen yourself in her.
As far as the girl herself is concerned, I hope you can let go of any guilt you may feel. You didn't say you felt guilt but I sensed in your words that you do or at least did. If it had been modern times you could have whipped out your cell phone and called the police immediately to tell them what you saw but no one had cell phones back then. Also, you never know, she may have been perfectly safe in her dad's car and was just messing with you. Maybe she's somewhere right now living a happy, well-adjusted adult life. Maybe not, but you'll never know. Because you'll never know and because there was nothing you could do, I hope one day you are able to let that little girl go. Take care. Peace,