Steven Wright, a clinical associate professor at the University of Wisconsin at Madison, teaches criminal appellate law and creative writing.The fate of Ahmaud Arbery’s murderers, whose federal hate-crimes trial began on Monday, took an unexpectedly dark turn last week when a federal judge rejected a plea deal reached with prosecutors. Under the deal, two of Arbery’s three killers were to accept responsibility for federal hate crimes; at least one had confirmed he would publicly admit race had motivated the murder. In exchange, the two men would serve the next 30 years in federal custody. The plea deal fell apart largely because the Arbery family objected.