You ask where he read about genetic defects, but you don't source the evidence for the dog conclusion? I understand it's on wikipedia, but seems strange to do that in response.

One question I have, how long does it take for a 'cadaver smell' to be present before a service dog like that can detect it. I ask because you said the body had been there 'long enough to leave a cadaver smell' and I'm curious what long enough means. I have no idea - not baiting you or anything.

You ask good questions though I think, and imo while on the subject, it's also worth noting that the dogs alerted to cadaver/blood scent on a Bible from the apartment with a passage the Bible's owner had marked from 2 Samuel, about the death of a child. While I'm not sure the dog evidence should be admissible in court, I do think it's interesting info, considering all the occult-implications that have been discussed.

Here's the wiki section on the dogs, for anyone who's curious: https://en.wikipedia.org/wiki/Disappearance_of_Madeleine_McCann#British_sniffer_dogs

and video of the dogs aiding in searches during the McCann case: https://www.youtube.com/watch?v=3EHJjpXii9o

(I think the hit on the car can be explained away just from hitting an animal with the vehicle or just roadkill elements from the road, but not so easy to eliminate the hits in the apartment)