nile la.w the detectives believed they were dealing with a serious crime, and yet. >> she's missing. technically there hasn't been a crime committed. >> that makes it somewhat awkward when you're looking into it. >> the boyfriend she was in wisconsin weekend before she went missing, they were all interviewed. >> that boyfriend from wisconsin had come to chicago, was helping with the search and soon was perhaps a subject of it. they came to you. >> they did. >> the perfect boyfriend. now, to police, a perfectly obvious person of interest. >> coming up -- >> a discovery in an empty parking lot. >> it was in a pretty secluded area adjacent to a lagoon. i watch enough "dateline" to know that's probably not a good sign. >> a strange sight to be sure. but what, if anything, did it have to do with nailah? when date line extra continues. because safe drivers cost less to insure, which saves money. they let you pay your bill electronically, which saves postage, which saves money. they settle claims qui