This time, a number of alert residents reported the car to the Washington County Sheriff, who responded quickly with two squad cars. The Sheriff's deputies spoke with the driver and have since reported that the driver was/is working for the Federal Government, mapping & surveying the neighborhood for the United States Census.
Although the driver was likely surprised by the response, it's good to know that so many residents responded with an abundance of caution. Thanks to everyone for their watchful eyes and concern for the neighborhood's children.