After Supreme Court denies 11th-hour appeal over pentobarbital
                                
                                
                                    (Newser) -
                                    After a dizzying 11th-hour back-and-forth, the Supreme Court of the United States this morning denied a stay of execution for a racist serial killer linked to 20 murders; Missouri executed Joseph Franklin shortly thereafter, at 6:17am local time, reports the  AP . It marked the state's first execution in...