Surely his behaviour changed when he reacted to the wall? If I remember correctly Eddie walked round and passed the car several times and only showed an interest when his handler called him back.
It does look confusing. BUT the dog was scenting the air between the renault and the other car parked.
OK. Say for arguements sake, there was cadaver scent on the Renault. The cars were brought into the car parking area, and parked. Now for all we know that car could have been parked CLOSER to the other car, where the dog was sniffing the air.
Perhaps the car was not in the right place so was moved a bit further away. Either way the car was driven along that area in front of the bays, SO THE DOG was sniffing the air. Lay people who do not work with dogs would think the dog was being prompted, that is not the case. I had it all explained to me by my K9 friend.
Like I said the cars had to be DRIVEN in and some of the scent if it was strong could have been transferred to that area.
The dog clearly scented something from the Renault. This is what the dogs do, their heads go up to find to the source. Grimes had to bring the dog back into focus. Whether it was scenting cadavar between the Renault or not we have no clue, but they do go off on trails and need bringing back to the task in hand. All they know is they must find the scent, they dont know they have to sniff each car, its the handlers job to keep them on track.
IF you watch the video, Grimes makes the dog check EACH car, NOT just the Renault.
No the dog was on a trail maybe nothing to do with the case, but when brought back to do the task he indicated on the door.