There have been many different versions of this. Kelsi tends to vary and is not always dependably precise. I know it frustrates the guy who does the timeline on Reddit.
I think it would be valuable to know where the shoe was found. But the info likely would have to come from members of the search party, IMO, and not Kelsi. I think it was more of a long distance shouting verification of who the shoe belonged to, than Kelsi seeing for herself.
I tend to doubt the shoe was found on the driveway. I remember Kelsi saying she was with a search party underneath the bridge on that side, when members of another party yelled up after finding the shoe. If they found the shoe on the private drive, then it wouldn't have been yelling up because they would have been on the same level as Kelsi, and not too far away. The driveway runs smack underneath the bridge on that side. This is a photo I took in November 2019. BTW, the most likely area of descent down the second stage of the hill would be center right of the photo, just beyond the largest tree. It isn't obvious in this photo but you really have to backtrack left toward the bridge before that second stage becomes less gnarly and severe:
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I think Kelsi was on the driveway level so the group yelling up would have been on the lower level, not far from the creek bank. This is what the dropoff looks like from the driveway level to the lower level. For whatever reason this slope is seldom depicted well. You can see the further right you go the dropoff becomes shorter and less severe, plus there are not as many gnarly roots. The best available spot is roughly 5 yards further right from the end of this photo. You have to backtrack 25 or 30 yards left from the end of the bridge, after going down the first stage of the hill:
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Last night Gray Hughes had a 4-hour call-in show on Delphi. I listened to only portions. At one stage (1:58:00) he had a graphic with various points spotlighted, including the location of Libby's shoe. He has it in yellow near the creek bank directly across from the crime scene, and a long way below the driveway. I'm not sure that it correct but it makes sense. If the bodies were spotted not long after Libby's shoe was identified then it has to be via binoculars used from the edge of the creek, and not dozens of yards further away on the private drive. Tree cover would prevent looking across the creek from there. The graphic also indicates that a shoe discovered there would be a long way from underneath the bridge where Kelsi was searching, requiring shouting back and forth. I would estimate the gap is 130 yards:
BTW, in that Gray Hughes video if you freeze the screen at 2:57:02 that is the best indication of where the bodies were found. It is a clip taken within days after the murders. Crime scene tape is still up. Somebody superimposed slide-screen props to attempt to conceal the people in the background. But at 2:57:02 those props slide away briefly and the people in the background are visible. They are standing near the small ridge and condensed circle of trees. I'm not sure if they are family members or investigators. The guy at far left has white hair so it could be Ron Logan.