I just got back from driving over the hwy 90 in both directions. The little side roads that are showing up on the maps are gated for maintenance entry only. I don't think she went below the bridge via one of those roads; hard to see the roads and the gates would prevent entry. If she was out there on the westbound bridge at 2am or so on a Monday, Tues. ,Wed. she could have easily pulled to the side on the left lane and thrown him over the guardrail and no one would see her do it. Very light traffic in the early morning hours of weekdays. (My son used to leave for work at 3am on hwy 90 and he loved how empty it was at that hour. ) After seeing the area again I am feeling that this is what happened. It may be possible also that he was thrown into the water of the river and changing water levels left him where he was found. That could have happened at other locations along the river, but it seems like her intention was to throw him into the river and he didn't land where she thought; hitting the rocks instead. If it was at night, it would have been difficult to see exactly where the water's edge is from the vantage point of looking down from the bridge. If she had moved further up west on the bridge, she would have been more exposed to cars coming from the intersection just ahead. Stopping where it seems she did, the curve allowed her to remain hidden and all she had to do was wait for a lack of headlights signifying that a car was coming. I took some video, I'll try to upload later. JMO,moo