Hours after sundown on a quiet evening in Squirrel Hill, Polly Sheppard recounted how three and a half years earlier on a hot night in South Carolina, a 21-year-old white supremacist gunman spared her after killing nine African Americans at the Emanuel AME Church in Charleston. It was immediately after Bible study when he opened fire, and with the dead and soon-to-be beside her, Sheppard retreated beneath a table as the murderer approached.