HARTFORD, Conn. — In a stunning reversal, the Connecticut Supreme Court on Friday overturned Kennedy cousin Michael Skakel’s murder conviction in the 1975 bludgeoning death of a girl in wealthy Greenwich. The high court issued a 4-3 ruling that Skakel’s trial attorney failed to present evidence of an alibi. The same court in December 2016 had reinstated Skakel’s conviction after a lower court ordered a new trial, citing mistakes by the trial attorney, Mickey Sherman. It wasn’t immediately clear if prosecutors will subject Skakel to a new trial.