SOP: Compel 15-year old girl to strip and probe with flashlights beside the roadway

Girl tells jury of deputies' strip-search:
"The attorney for the sheriff's office and deputies, however, said the daughter offered to be strip-searched, Arnetta McCloud invited deputies to check her sister's home and the family was 'cooperative and pleasant' during the search of the house, just as they were when they gave consent to check the car.
"'It was all by the book,' attorney David Cornell said."

Even assuming that the parents had consented as the lawyer for the cops involved indicates, how can it be "by the book" to strip search a minor female by the roadside? What book is that in?