mr. mcginnis is behind the victim. the victim is a few feet from the edge of the cliff. mr. mcginnis' left hand is on the victim's left shoulder. >> investigators thought b.j.'s position was extremely suspicious. >> the only reason he is looking to the right is -- we would speculate -- to look for vehicles, look to see if anyone can see. and that's the last photograph taken of her alive. >> it's almost as if she is in motion then, and the husband's hand is up against donna's shoulder. >> and the last four pictures were even more unusual. >> i think those four photos are surveillance pictures. i think that was virginia mcginnis looking through the viewfinder of her camera to make sure nobody saw what they did. >> they're not photographs a tourist is going to take. and particularly the fact that the sequence, to this day, i don't understand why they would take it. >> there is a shot looking down the cliff where donna fell. then three panoramic views. one to the left, another to the right, and the last behind them. >> now, if she has slipped and fallen, then who is taking sights