More likely then not, the neighbor probably had a grudge with the girls mother, and this was a way to get back at the mother.
Why, who knows, maybe she parked in her driveway, maybe she didn't give her milk one day, but sometimes neigbhors do petty things on spite to each other.
After 4-5 hours of total occupation of their time, they just said "we'll call you"
We made good money for the next several years.