CANDACE MOSSLER, right, and Bobby Jo Oliver are amused by a deputy sheriff who chatted with them during a recess in the trial of Mrs. Mossier. Miss Oliver is a cousin ofCandace's nephew and co-defendant Melvin Lane Powers. The 46-year-old widow and Powers. 29. are charged with the murder of millionaire Jacques Mossier. (UP1 Telephoto)Mossier defense rests