State Says Phone Calls Vital Clue in Mossier CaseBy ARTIUR EVERETTMIAMI. Fla. • AF*—'The state claims telephone calls from Melvin Powers to his aunt, Candace Mossier, are a vital clue in the 1904 slaying of her multimillionaire husband.A jury at the first - degreeHRS RUSS CREWmurder trial of aunt and nephew heard the prosecution emphasize a phone call Powers made from Houston to Miami less than l.» hours before the slaying of Jacques Mossier. 69.This defendant at the time was making his arrangements with ( andace Mossier to come to Miami and commit the deed that occurred at 1:45 a.m. June 30. 1964.” the state charged at trial summations Wednesday.Then, the prosecution went on. Mrs. Mossier received phone calls from Powers after her husband s slaying “to tell her its all over with, she can go back to the apartment now.**The sensational first - degree murder trial was expected to go to the all-male jury before sundown today. The trial began Jan. 17.State Ally. Richard Gerstein was to close the state's summation. Following him is Houston attorney Percy Foreman, whose fee for the defense is $200,000.