MOO Terrain was leafy, no grass yet. Half an hour of dry time and pants wet the knee would be dry enough to not appear as soaking wet, especially from any distance.
I don't think he exited where anyone saw him, in my opinion the suspect entered on the south side and left on the south side.
But if it was an unplanned crime so that the suspect entered on the north and consequently after the crime had a parked car stranded on the north side, I would think if he was at all familiar with the area, he would not go get it by openly walking the north side trail or 300.
With a little more effort and an extra mile he could wrap around the park to the south and get to the stranded car up i25..
You know, I think it was unplanned in the way that he expected to meet only one girl, the one he agreed to meet at the trails.
I don't know what he planned to do with that girl, to rape, kill, or like JP, get for a girlfriend? God knows these young men. But the tiny snippets of what we know about the tape...
The girls are talking about the creepy guy. Could it be something like, "where is your friend? I hope it is not that creepy guy we saw, but there is no one else here..." And then Libby said, "the trail ends here". Did she mean, they have followed all the trail, and haven't found anyone, so she assumed, he stood them up?
They probably expected someone very different... and the BG being older, but still from Delphi, might have known something about them, the school, be intriguing the girl online, hinting that he was from her class, or HS. It is so easy. One of them might have had crush on a local boy and expected him to be on the other end of the conversation! I mean, they were young, and they knew Delphi. Difficult to imagine something scary, right? It is like someone telling a kid to meet at a local park. The only thing is the high bridge, but it was local.
I think he was livid when he saw two girls instead of one, as he did not expect it. Maybe this is where he told Libby to leave (or, alternatively, Abby, if he was stalking Libby). Because someone said that one of the girls had the chance to leave but did not want to abandon the friend.
So maybe killing two was not planned, initially. And god knows what he planned to do with one. Maybe he did not plan to kill at all, just have a rendez-vous. But then he got angry, and the other one did not leave, and he just snapped, because he is a madman.
Is it possible, or not at all? This could explain so many things.
The only thing I don't understand is the recording. Anyone local, anyone known and suspected, and a voice analyzer...could do it. So the voice is of someone they don't suspect. But if he was wearing a mask with the full neck, that could have changed the timbre of the voice, although not the manner of speaking.