The dogs don’t know who was carrying the dead body, though. Nothing against the parents there. All we know is that someone removed the body, and we already knew that.
The dogs should hit strongly on the car if a body was in it for a few hundred miles.
How do they know the hair belongs to the missing girl? Hair comparison is not that exact.
An 88% DNA match, isn’t.
Keep in mind that these dogs will “hit” on the scent of ANY dead body, not just the one that’s the subject of the case. There’s not a police department on the planet that isn’t capable of placing dead body scent anywhere they want to.
Clumps of hair would probably have hair follicles.
Those can be accurately identified, I believe.