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A period of ONE DAY would make the difference between " no scent detected" in any area other than where the car was parked and all the places at which Mr. Gricar was " seen" by witnesses?
I would have to see field trial data on the difference in a 24 hour period with same to very similar weather conditions, and one location at least being indoors and thus sheltered from weather elements.
Either the car search was or is being misinterpreted, or he doesn't seem to have left any trace of himself for a scent dog to find in ONE DAY. How does a mere mortal do this? I don't believe the two stories mesh well at all. Something's OFF about the dog story.
AND as I asked my fellow posters --What would be the result of the scent dog hitting on particulate matter ( dust composed of skin cells, etc) from the CAR and not from the physical presence of Mr. Gricar in the SOS parking lot?
This would seem to be possible if someone from LE opened a door or the trunk to the car door shortly before the scent dog was in the same location, I would imagine, from my knowledge of molecular biology. However, since I lack knowledge of scent dogs in the field, I cannot assume to presume.
Again, there should be data available from control tests done with the dogs and handlers OR in other cases which substantiate any answers. I am not certain we have the completely correct answers. No disrespect meant to anyone, but if there was any staging done in Lewisburg, then this could be how we narrow it down from a shop parking lot to a crime scene.
Where a scent can be detected, blood hounds are far and away very reliable. Where the dog has difficulty is where the scent has been contaminated by other animal scents, overwhelming varying human scents and such things as auto exhaust. It is very possible that in areas where there was little to no contamination, the bloodhound was on track but lost the scent where there was heavy contamination such as in the park and the SOS etc... I have seen an experienced this on more than one case. Little Lauren's trail petered out when she hit the main road where the auto exhaust was very thick and had wiped out the scent trail. Two different bloodhounds checking the trail on two different days had the same results.