Keela alerted inside the boot not outside. She has to get real close to alert to microscopic blood. This would rather prove that Eddie detected cadaver scent coming out from the car and that was the scent he was chasing in the underground car park. The boot was reported to be left open at the villa every time the witness turned her car around so she reported it and it wasn't followed up.
"The dog has also been trained to identify cadaver scent contamination where there is no physically retrievable evidence, due to scent adhering to pervious material such as carpet or the upholstery in motor vehicles. The dog will alert to the presence of cadaver scent whether it is at source or some distance away from a deposition site. Cadaver scent cannot readily be removed by cleaning as the compounds adhere to surfaces. The scent can be 'masked' by bleach and other strong smelling odours but the dog's olfactory system is able to isolate the odours and identify specific compounds' and mixes. The interpretation of any alert is given when the dogs recognize a specific odour as a result of a response to the behaviour for which they were trained. If they had any doubts they would not give an alert. EVRD gives an alert by means of a vocal bark." (MG)
You don't quite seem to have grasped the fundamentals.
Eddie alerted to spots of Gerry's blood on the ignition key (which was reacted to by both Eddie and Keela, the reason it was sent to the FSS).
Keela alerted to the boot.
Eddie didn't.
A mix from the boot was sent to the FSS.
So either the mix from the boot contained a component of blood (in which case,
both dogs should have reacted to it).
Or the mix from the boot
didn't contain a component of blood.
(In which case, neither dog should have reacted).
