I wrote a second post last night re: JW's actions but it was very late and I either didn't actually post it or perhaps it got deleted?
In the beginning, I think the first huge red flag with JW was his jumping to conclusions. Why did he, after a few hours of looking for her, finding her phone (at that time, did they know about the shoes too?), and finding out she had not gone home, immediately think the worst and call her parents?
However, I don't think jumping to conclusions is necessarily limited to JW.
1. Her parents were calling hospitals by that afternoon looking to see if maybe LS had been admitted there. I'm not a parent so I'm not sure how normal that is in the first few hours of their daughter just sort of not responding. I would think a missing kid is probably worrisome at minimum, but in the context of knowing she had been out partying very late the night before? They also booked a flight and arrived the next day, right? I am NOT criticizing their worry at all, but it makes me wonder what was said to them to start calling hospitals and booking flights. What if LS HAD just been sleeping it off somewhere? Those actions might seem a little more extreme had that happened (and it's so sad that isn't what happened). What exactly did JW say he had heard?
2. I know initial reports said JW filed the missing persons report, but I thought later reports said her friends filed the report (I had a link last night stating only that her "friends" filed it; I thought I read somewhere else it may have been BW & HT). This seems like a big deal. This is more than just JW telling her friends, "hey, LS is MISSING!" and them just agreeing that this is possible. The fact that they took the time out of their day to physically go to the police station, seriously talk to the police (who probably weren't very convinced at that point that their late-night partying friend was, in fact, missing), and file a real, bona fide missing persons report is pretty big. Not only that, but given some of their histories with the police, I highly doubt that was a place they were super comfortable at. To me, that says, that whatever they heard from JW or elsewhere was enough to convince them that this was serious. I'm not sure if HT's comment was related, but when I think about it that way, the comments about it "going too far" really make me wonder.
Short personal story: Studying abroad, A friend of mine stayed behind with another friend drinking at a bar and at some point, met a guy who convinced her to go home with him. The other friend tried talking her out of it, but she refused, so he left her go with the local. Her phone died and she didn't show up the next morning. I was freaked and wanted to get some kind of help, but the rest of our friends said it was no big deal and to wait until that night and if she didn't show up, we would report it the next day. She turned up a few hours later fine. But seriously, this took place in a foreign country! lol.
Having that experience, I think it is a little weird that her friends went along with the missing persons report early on. I can see them being concerned and maybe even agreeing that she appears to be missing, but to actually go file the report?
That's not saying JW didn't do additional weird stuff afterward. It just seems like everyone had jumped to the conclusion something bad had happened. Why? What did JW hear? What did he say to her parents? Did LS' friends hear the same thing from JW, or someone else? Hopefully, whatever got the kids hyped up was related back to police. Of course, JW could have just manufactured some scary story to throw everyone off if he was really behind it, but whatever was said, had to have been believable to these people at the time and also not tip them off (at the time, at least).