investigator steve--. >> do crime scene techs do missing persons cases? >> not normally, but this was a little different. >> she was a social animal, and they do not just vanish, right? >> exactly, to just disappear with no trace, without talking to anyone, it was unlike her. >> so, he looked up at lauren's front door, second floor, left side. nothing seemed amiss. out front, a garbage truck lumbered up. but, blocked by the police cars, it was unable to empty the complex's trash bins. the truck moved on. by then, the lieutenant was in the apartment, looking around. >> it felt like somebody walked out, shut the door. >> puzzling. the day was hot already. a humid breeze scattered across the yard. >> we came up over here, that is when the wind kind of hit you in the face, and you could smell something. you could smell a foul odor. >> a recognizable foul order? >> pretty much.