After Jamiel Shaw's son, Jamiel Shaw Jr., was killed back in 2008, there was a splash of media attention mourning the senseless murder of a young man on the right path. Then came a long, dark silence when it seemed that the world forgot. But Donald Trump, who Shaw believes was "sent from God," didn't forget. Last year, the Republican presidential candidate contacted Shaw to talk about the tragedy, in which Shaw's 17-year-old son was killed while walking home. Two Hispanic men had waylaid him, demanding to know what gang he was in. The young man, a star football player...