had the right guys, in part because of something that happened when benanti was arrested. >> benanting something in his hands, clenched fist. his fist is opened up. and there's a crumpled piece of paper. >> reporter: the feds took a look at it. that crumpled paper had details, names and numbers that sent a chill down their spines. >> three names, handwritten, bank executives in greenville, in spartanburg, south carolina, their titles, their bank locations. >> reporter: prosecutor lewen believed these were the next victims. so with a search warrant in hand, fbi agents and lewen spent thanksgiving day and black friday of 2015 in the smoky mountains at a house called southern comfort. there they found evidence of a sophisticated criminal enterprise. and evidence that would finally reveal who that mystery woman was, the woman who wanted milk for her baby. so agents, who is this? coming up -- the answer and a warning. >> be careful what you put out for the world to see. the minute you hit post or hit send, you have no guarantee who's gonna be able to access that. >> reporter: that baby pi