No one finds it strange that someone ordered pizza to Nancy's house? And the guy who delivered it looks identical to the footage? Same walk and everything? He also bypassed security and press to walk up to door? Obviously it's likely he's innocent, but it would be crazy to just overlook it.
Suspects always return to the scene, and most of them insert themselves into the investigation, some get interviewed and others will attend search parties. Did anyone question if he was a legitimate dominos delivery driver?
the link of him walking: