Fran and I have been following the news story about the missing baby from Kansas City. One of the developments is that the police brought in a cadaver dog in the baby's home and the dog "indicated" as the term goes on the floor on the side of the mother's bed.
If you haven't been following the story, the mother at first said she just went to bed, then later admitted she had "more than five glasses of wine" and was by her own description "drunk."
Anyway, we were curious about how long it takes for a dead body to give off a scent. And I learned the answer while flipping around the channel and landing on HLN (the Nancy Grace channel) although this wasn't Nancy Grace, it was another of the angry women.
So here's the answer: a cadaver dog can smell death if the body has been there a minimum of 90 minutes at the earliest, but definitely when the body has been there for three hours.