Lauren didn't seem to be with any other girls, once she left the original party spot...another girl might have noticed more if Lauren was ill as opposed to just wasted, IMO...and been a little more concerned...not to be sexist, but I think it is true...
I think you are correct mostly. Of course, there are exceptions both ways. One of the things I strongly feel got through me in my partying days was our rule of always having girlfriends with us. There were two occasions that I almost got in trouble while partying. Both times I had girlfriends see that I needed help and save me from potentially bad situations. I, in turn, helped my girlfriends when they were in bad situations including helping a friend who had alcohol poisoning. I know it happens all the time, but I really, really wish Lauren and every girl had a similar girl code in place. Maybe they typically did, but for some reason this night was different.
I am also feeling very grateful that I have a boyfriend who, even before we dated, was always very, very gentlemanly toward me. He wouldn't even let me walk to my car alone after our night class together even when I had shoes and was totally sober and not walking down any alleys. There are some men who realize that part of the good they can do in life is to care for and protect others and especially those vulnerable (like, little blonde girls who sometimes don't realize how vulnerable they really are).
But, it is what it is and no one can turn back time and change what happened. Right now, I just wish we could find her damn body so her poor parents can find some peace. Where could she be? Who could have hidden her? Why isn't someone cracking under pressure? Somewhat rhetorical, but I hope something breaks soon.
I am also doubting anything we ever knew so maybe LE is lying about the truck. Maybe the 338 sighting is true. Maybe JR is lying to protect someone. Or maybe he did see her walk away perfectly fine at 430. Who knows? Nothing would shock me at this point.