WASHINGTON — New Justice Ketanji Brown Jackson has issued her first Supreme Court opinion, a short dissent Monday in support of a death row inmate from Ohio.Jackson wrote that she would have thrown out lower court rulings in the case of inmate Davel Chinn, whose lawyers argued that the state suppressed evidence that might have altered the outcome of his trial.Jackson wrote in a two-page opinion that she would have ordered a new look at Chinn’s case “because his life is on the line and given the …