Dear
@bigdata,
Thank you for sharing your valuable insights. It is meaningful and very helpful to have a new person on this thread. A new set of eyes, so to speak.
Listening to the audio, I hear a confident voice as well. I also agree with you that this wasn't B.G.'s first murder.
As far as I have read, the L.E. haven't confirmed that they checked burger places, etc. This does make great sense, especially if the perpetrator was from out of town and had been scouting that area all morning.
I'm curious to know whether you have any thoughts on if B.G. had been staying in the woods there (across the bridge and near where the girls were found) and surveying who was walking around from a vantage point on the bridge.
My thought is that he had been watching them and as they approached the far end of the bridge (near where he was), he made his move - walked onto the bridge, passed them and then turned around towards them.
I could be wrong, of course, but this makes the most sense to me because he would have been noticed more (in my opinion) being as bundled up as he was, had he "lingered" around the trails at the foot of the bridge.