He breaks from his hurried typing and clicking to give Ianto a quick squeeze, definitely understanding Ianto's anger (and feeling some ego bruising himself but he doesn't have as much to be upset about). Then he returns to the computers.
"Got it!" He slams a hand on the desktop and points. "There he goes, moving off away from you, Doc--" The footage shifts from camera to camera when necessary. "Up until he gets into an area with no CCTV. And here, this monitor here, this is a much more recent piece of footage. And... Jenny."