First Insurance Agency of The Hill Country ran a controlled experiment: publish a single authoritative local article and change nothing else—no ads, no backlinks, no citations, no SEO tuning. Within one week, that single asset produced three simultaneous outcomes: top organic ranking, inclusion as a cited source in Google AI Overviews, and secondary brand placement on the same results page. This case study examines how modern AI-driven search systems now interpret local authority, and why one well-constructed asset reshaped an entire competitive landscape.