When Dan sends Ace to search, the dog's leash is clearly attached to the dog's collar. In an actual search, the leash is nearly always attached to the animal's harness. That is, in fact, one of the primary functions of the harness. With the leash on the collar, the dog's ability to search is severely hampered.
Wenatchee Dispatcher states on the phone to Julia Harding that it is the Wenatchee County Sheriffs Office. There is no Wenatchee County. Wenatchee is in Chelan County.