Hello, Ive been following this thread from close to the beginning. I cant help but to think that this was completely set up through SM (maybe snapchat?) by the perp from the beginning. To me it makes sense that this started some time ago with the suspect contacting one of the girls (liberty?) through some kind of meeting app, kids do it all the time, my kids would meet girls all over the state when they were in high school and traveling for sports. If she was to meet a "kid" and start talking to him, maybe even exchange pics (not genuine of him of course) and eventually gain a level of trust that could explain why a 13 year old girl would go out alone (with a possibly unexpected friend) to meet someone on the middle of a high bridge unprotected and isolated.
This makes perfect sense to me that a predator would disguise himself as a young innocent boy on SM then lure the girl (or girls) to that bridge. Once he knew they were there he would then walk out himself seemingly just a guy walking the bridge thus explaining a) being out on that bridge when they are, b) his head down and hands in pockets, and c) his being on the opposite side of them. I would postulate that the girls were out on the bridge taking pics and videos to occupy their time while waiting for their young friend to show up and inadvertently captured him in their videos.
Once on the bridge and knowing the girls were indeed isolated and having cased the situation up close he could have either struck there and forced the girls to go with him, or possibly just walked back off the bridge and sent a message to them to meet them over by the cemetery instead of the bridge and they would have gone there willingly to meet the "boy"
After much thought I believe that this person knows the area very well, he knows peoples hiking patterns, he knows the cemetery, he knows the bridge and dropoff points, and even where to commit the crime and leave the bodies undetected. I would submit that he grew up there exploring that area extensively as a child/teen. I would also submit that he does not live in the area anymore, seeing as no one from that small community has recognized him. It would seem plausible to me that he would be a truck driver of some kind as he would have time on stops to "hunt" the SM hookup sites for the perfect victim and set up a meeting when he was going through that area.
I don't believe for a second that this was and accidental meeting and I am very concerned that this is a very sophisticated trap that a deviant sexual predator/serial killer laid out very intentionally probably using an untraceable phone, fake names, fake pics, etc, his only real mistake being inadvertently captured on a video that got sent somewhere or uploaded to the cloud. Whether this is his first crime of this nature is of course unknown, but if he's not caught it wont be his last. Lets hope LE is able to identify him and arrest him soon.