Many rural lawmen fall into a routine where they deal with the same thing over and over again: speeding, drunks, disorderly teenagers, lost pets. They don’t have any sort of skills to do this sort of work.
I don’t think I’d call Tucson rural, but the Sherrif’s office doesn’t have much/any experience with kidnappings, especially of the mother of a nationally known celebrity and they probably should’ve turned this case over to the FBI quickly.