Stephen Pile, "The Book of Heroic Failures"

The Least Successful Police Dogs
America has a very strong candidate in "La Dur", a fearsome looking
schnauzer hound, who was retired from the Orlando police force in Florida
in 1978. He consistently refused to do anything which might ruffle or
offend the criminal classes.
His handling officer, Rick Grim, had to admit: "He just won't go up
and bite them. I got sick and tired of doing that dog's work for him."
The British contenders in this category, however, took things a
stage further. "Laddie" and "Boy" were trained as detector dogs for drug
raids. Their employment was terminated following a raid in the Midlands in
While the investigating officer questioned two suspects, they
patted and stroked the dogs who eventually fell asleep in front of the
fire. When the officer moved to arrest the suspects, one dog growled at
him while the other leapt up and bit his thigh.