then middle of the night, 20 miles south of town in a place called calumet city, a cop was on routine patrol checking out a golf course parking lot. his name is calvin lucius. >> i was in this area right here, i noticed right in front of me, six perfectly sta lly st cardboard boxes right in the parking lot. something stood out, so i'm like something's not right here. >> narrator: inside the boxes, pills, hundreds of them. >> i was thinking this might be something big, some type of narcotics and drug related case. >> except it looked like examples, something a pharmaceutical rep would be handing out to doctors. >> what were they? >> different types of medicines, i can't even pronounce the names. >> narrator: the label, the address to a storage locker and a name. nailah. pretty soon -- >> the fib and chicago police, everybody was out here looking. >> narrator: including detective greg jacobson. >> it was right next to a nature preserve, that was right adjacent to a lagoon. i watch enough "dateline" to know that's not a good sign. >> they drudged the lagoon. >> narrator: back and forth t

hush of calumet city, calvin lucius made his way from the ear buds his partner found hanging in a tree, behind a derelict video store. >> i got right around in this area, and just looked over and the body was there. >>>> what was that moment like? >> shock, you don't know if it's her or not, but you have a idea, because it's a female body. to dental records to confirm, it was nailah. >> i think this type of f death, it doesn't just kill that person, it kills a l lot in the family. it's the absence of a piece of you because that person is not here. >> i can't describe it, it's like you know it's happening, but it just feel real. it just feels like you're in, literally like in a nightmare. >> narrator: an autopsy confirmed the death was by asphyxiation, so now it was homicide, but who was the killer? not andre. confirmed he was in milwaukee when nailah vanished. >> everything with him checked out. >> narrator: as for being questioned -- >> are you upset by that at all? >> they should have done that, that's part of their job. >> narrator: what about reginald potts who had been so helpful.