his name was reginald potts.ind him, he stepped up and called them. >> he wanted to know why the chicago police wanted to talk with him. >> he agreed to stop by headquarters for a talk. >> he gives us a lot of information. >> he met her a year earlier he told them. by pure chance really on the street in the ritzy gold coast. she was sophisticated. so was he. they dated briefly. realized it wasn't for life. though a girl could do worse, what with his white bentley and duplex overlooking the lake. >> he lives in a very large apartment complex, a high-rise. >> nice place? >> yes. >> beautiful. >> in an upscale area in the city. >> that's where you want to live. >> wow. reginald told them everything he did the day nailah vanished. everywhere he went. very detailed. the day's events, early evening shopping with friends at target. bar hopping later with not one but two girlfriends, separately, of course. and after that, an intimate plan with a third girlfriend. >> they make arrangements to meet at reginald's apartment