No detective in the world can rule out death because those cadaver alerts cannot be swept under the carpet. It will have to be explained. Any detective worth their salt will have death as a good probability either as accidental or murder. Nobody knows if a bag was used or not. A bag could be used and then brought back so it's not missing or later dumped - they will have to check airport CCTV to identify the other main luggage bag.
pathfinder, I know you are fairly new ... so you will not have seen the extensive discussions on the dogs markings. I am too tired to go over it all again. I suggest that you PM ferryman; he is an expert on the dogs markings.
They are NOT necessarily what you think they are. In fact the minute samples taken could have been from a huge percentage of tbe population. From memory, I think it was 50% of the population. I am happy to be corrected if I am wrong.
Also the dog markings cover other things than cadavars. IIRC they also cover saliva, tears, blood, urine ... so they simply are not safe as an indicator of death on their own
The dogs markings on their own mean nothing. They have to have forensic back up, and these didn't.
Sorry pathfinder, but you are barking up the wrong tree.
Just forget the dogs markings, they didn't have the necessary back up to mean anything.