I have been very interested in this case from the beginning, and I watched the entire trial, and have read every book I could find about it. My general opinion has been that OJ did the dirty work himself. I would be surprised, actually, if Sydney didn't see something... and maybe the boy did, too. There had to be some loud voices, or other scuffling sounds that would have at least alerted the dog, who certainly could have awakened the kids by barking, if the other noises didn't. Wouldn't it be kind of odd that she would think her father did this, if she didn't actually recognize him? The average child wouldn't jump to that conclusion automatically.... would they? I mean, just automatically believe that one parent killed the other one? Unless there was some reason in her mind that led her to believe that her father might just do this; she may have known about the prior domestic violence, and that her mother was afraid of OJ. Perhaps she really feared that her father might harm her mother?
I know that I would have been more inclined to try to believe in OJ's possible innocence, IF he had tried to do alot more in getting the police to find the killer. He really didn't seem to have more than a token interest in it. But, then... there was so much else that happened that night that was hard to believe that it could all be coincidence, at least in my mind.
This case is one that I really hope that someone solves someday, but there will never be another trial for OJ, for that would constitute double jeopardy. But, as you said, Carrie.... what a terrible memory for this child to have witnessed such a brutal crime against her mother, if indeed she did see it. Poor girl... and this has to be tough on her brother, too. They were just little children, and they lost their mother... that was a huge trauma in itself.