Olga Khazan revisits her hometown to ask McKinney residents how they’ve been faring since a 2015 viral video captured Eric Casebolt, a white police officer, using excessive force on Dajerria Becton, a black teenager, at an unauthorized pool party. Khazan soon finds that tensions in the community are still running high three years later, and that the fallout tracks with how private club pools and homeowners’ associations have historically provided a cover for redlining.