>> in a company of -- >> -- astronomical. >> -- 10,000 people here in des moines, what are the odds that they would be in the same -- >> in the same cubical, they were. >> but they got on fine. never any bad blood. and david moffitt had no criminal record. so should detectives add him to their list of suspects or what? >> at this point, i don't know if i have the complete story regarding dave or not. >> coincidences. sometimes they come in clusters, don't they? not long after angie's memory coughed up the name dave moffitt, there was another coincidence. >> we figured we needed to continue and focus on dave and see where that leads us. the first thing that was done was a background make-up of dave to include to see if he had a weapons permit. and so while that check for the weapons permit was being conducted, another office person heard the name and recognized dave moffitt. and she immediately said, "he