hush of calumet city, night patrol officer calvin lucius felt his way past the glittering earbuds his tree to the inky black fringe of forest at the back of a long abandoned parking lot behind a derelict video store. >> i probably got like maybe right around 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 an idea because it's a female body. >> they had to resort to dental records to confirm. it was nailah. >> i think this type of death it doesn't just kill that person, it kills a 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 doesn't feel real. it just feels like you're in literally like in a nightmare. >> 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. >> as for being questioned -- >> were you upset by it? >> not at all, no. they sho