A pool cleaning company is explaining why workers were spotted at Nancy Guthrie's home amid her disappearance. "We were there to provide general pool service - nothing more, nothing less," Ken Kingan, general manager of Ambiance Pool Service, exclusively told Us Weekly on Friday, February 13. "We were escorted in and out to provide service to the pool. It's an ongoing weekly pool service, once a week every week." Earlier in the day, reporters shared video of work trucks from the Tucson, Arizona, company visiting Nancy's backyard.