I have always had my reservations about the key fob actually being in the sand. It seemed a strange thing to do. More like the demonstration of a party trick than a genuine investigation.
The parallel with Grime's modus operandi in the Bianca Jones case is uncanny: stuff tested in one place, transported to another and tested a second time.
In Detriot (Bianca Jones) it was the car seat, taken out of D'Lane's car, wrapped in brown paper and hidden in offices for the dog to sniff out a second time; also D'Lanes clothes, similarly treated and
not found by Morse.
Under the auspices of the
Forensic Canine Program this business of testing a thing in one place, then testing it again in another place was the (additional) safeguard to a cadaver dog desensitised to the scent of blood that was the basis of the rationale that an uncorroborated cadaver dog alert could be accepted as stand-alone evidence of
murder.