The sighting of him walking by a bus stop was a witness and not CCTV. The CCTV was from much later in the afternoon and that is what has been discounted as not him.
They are apparently interviewing the bus drivers to see if anyone saw him boarding a bus.
I thought we'd have news by now.
I wonder if he'd been to this place before. It does look more possible to get lost on the walk back if they'd only done it the once on the way down that morning.