OK, not the baby’s room.
Still wonder about the whole time of death ‘till a scent can be detected thing. 4 hrs? 6 hrs? Less? More?
How long was the baby dead?
The mother could have had the neighbor over as an alibi. Did anyone other than the mother and the father see the baby recently?
From CSI Crime Sniffing Dogs
http://www.biologycorner.com/anatomy/senses/crimedogs.html
10 minutes from death.