Guy Davis in the Crossroads Theatre Company’s production of “Sugarbelly and Other Tales My Father Told Me.” It’s haunted him, his whole life. In “Sugarbelly and Other Tales My Father Told Me,” a unique and powerful theatrical event that is currently being presented by the Crossroads Theatre Company at the New Brunswick Performing Arts Center, blues singer-songwriter Guy Davis says that when he was growing up, members of his family repeatedly told him the story of a young woman named Sugarbelly, who was mysteriously murdered. He still thinks about it all the time. And so, he says, he created th…