Let us see some data, on false positives, negatives, and blinded dog handler protocols. They always start by saying how dogs have more olfactory capabilities and then use their “successes” rather than proper testing methods. Here is a recent article about these concerns. https://www.science.org/content/article/should-dog-s-sniff-be-enough-convict-person-murder

Here is the promo article on detection dog successes and popularity with law enforcement.

Research and training program of detection dogs to locate COVID, agricultural diseases, and dangerous chemicals and protect the public safety.
— Read on gfjc.fiu.edu/research/detector-dogs/index.html