>> lauren's family called david. he said he hadn't talked to her in days. >> i remember specifically him, like, hanging up and then calling back a couple minutes later, like, wait, what's going on -- like, what is going on? >> back at the apartment, ashley rounded up lauren's law school friends, including that ex-boyfriend, joe, with whom she'd spent the night last time any of the friends saw her. >> joe immediately went to the law school to search the law school for her. >> while the other friends took a careful look around the apartment. they found some food wrappers, and in her car a receipt from a zaxby's restaurant drive-through, time-stamped the evening after the prestudy party. now it was wednesday night. >> zaxby's was at that point in time four days old. >> so, where did she go, for a run? did she have some sort of accident? or was it something even worse? lauren's friends knew she spent