The 1947 Black Dahlia murder case is unusual in that a son has been attempting to prove his father's guilt, not innocence, and to that end the son now is using cadaver dogs to search the dirt basement of his childhood home 1/2 century after the murder occurred.
The use of human remains K9 in this case raises a relatively new evidentiary question: can trace evidence of human remains detected by cadaver dogs be used to solve death cases. Dogs can detect trace amounts of human decomposition smell where no physical evidence remains. This gap between a dog's scent detection ability and human's scent measuring ability has recently created evidentiary problems in cases where the FBI has prosecuted defendants on the basis of trace scent evidence. However, here if the dirt lab-work shows human decomposition, that will create more measurable evidence for us humans to understand and therefore potentially use the scent evidence in a court of law.
Look at the dog working this case - he has only one back leg. A poster dog for the value of disabled work dogs.