IIRC, the words he used were, Lauren is missing. Mrs. Spierer speaks of that phone call and hearing those words. I mentioned it before and I'll mention it again, Scott Peterson did the same thing, used those same words.
My question is what did JW do that morning, aside from driving his roommate to class, picking up LS's cell phone from the bar and making some phone calls to ascertain that Lauren was indeed "missing," as opposed to passed out at someone's apt that he did not know of yet.
What time did that phone call take place?
Bold is mine.