Oh my goodness how terrible! I wonder how I missed that? I also wonder why I never thought Eddie was put into the car? I always thought it was just Keela who checked the boot, and they both alerted to the key when it was removed from the car. I missed that translation error completely. In fact, I always wondered why Eddie wasn't put into the car.
That's the origin of numerous lurid headlines on cadaver scent in the boot and one of the most enduring myths: a simple translation error. If Almeida had watched the footage, he should have noticed that Eddie never did bark at the boot and that it was only Keela who was allowed internal access.
I presume that Grime's reasoning was that as Eddie had reacted to the door, that was reason enough to let Keela try to pinpoint any blood. Before Keela went in, the car was given the once-over by the forensic people for them to recuperate anything of interest (fibres, hairs, nail clippings, and presumably a search for body fluids). Putting Keela in after that avoided contamination and adding dog hairs.
IFAIK, no body fluids were detected as there's no mention of it in the report. The only indication that there may have been a molecular trace of blood deposited at some point was Keela's alert.