Cadaver dogs and really old cases. Total B.S. or real?

I… never would have thought of that, but now, I always will.

Cadaverdogs.
♪♫ Doot Doooo Do Do Do ♪♫
CadaverDOGS!
♪♫ Doot Do Do Do ♪♫
Cadaverdogs…
♪♫ Doot Doooo Do Do Do,
Do Do Do, Do Do Do,
Do Do-Do-Do-Do
Doot-Doot Dooo Do ♪♫