kerriger showed him the photo. >> we asked, who's that? he said, he's my neighbor, he lives two floors below. >> and just like that, a big piece of the puzzle plopped into place, but fair warning, as you'll see, puzzle pieces and some residents of this downtown lost, might not be quite what they seem. >>> coming up -- >> there's a massive sense of disbelief. >> the investigation takes as many turns as one of the building's hallways. >> i never had a case this complicated before. >> when "suspicion" continues. n. n. no, no, no, no, no. cancel. cancel. please. aaagh! being in the know is a good thing. that's why discover will alert you if your social security number is found on any one of thousands of risky sites. at priceline, to save you money.ways like mixing and matching airlines to get lower prices on flights. oh, that's how i saved on my trip! oh, for your wedding?! no, my ex-boyfriend's wedding, he's confused. jason! mix and match airlines to save more. sharper vision, without limits. days that go from sun up to sun down. a whole worl