Usually, when someone who’s been a mainstay of a community gets shot and killed in his own home, there’s a public outcry to bring his killer to justice. But not in the idyllic Pacific Coast town of Fort Bragg, Calif., where the citizenry has risen up in support of the man who pulled the trigger. Aaron Vargas has been in jail ever since Feb. 8, 2009, when police say he shot and killed Darrell McNeill, the man he alleges sexually abused him when he was just 11 years old. After the shooting, 12 other men came forward to say that...