WHO IS GUILTY?
Sandra Dee (S), Mustang Sally (M), the Omelet (O), and the Druid (D) were all suspected of committing a hideous crime. The following four facts were established: (1) If both S and M are guilty, then O was an accomplice. (2) If S is guilty, then at least one of M or O was an accomplice. (3) If O is guilty, then D was an accomplice. (4) If S is innocent then D is guilty. Who is definitely guilty and who is doubtful? Explain your reasoning.