Police dog
Cadaver dogs are trained to sniff out decomposing bodies.  Dogs' noses are so sensitive that they are even able to smell bodies that are under running water Important work was done by Dr. Debra Komar at the University of Alberta, along with the RCMP Civilian Search Dog Association in this area. As a result, training techniques were developed, and cadaver-sniffing dogs now have near 100% accuracy rates. Her research has been published in the Journal of Forensic Anthropology.