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SACRAMENTO, Calif. (AP) _ Three former Symbionese Liberation Army members pleaded innocent Friday to a 1975 bank robbery and murder. Prosecutors plan to call kidnapped newspaper heiress Patricia Hearst as the chief witness at the trial.

Superior Court Judge Thomas Cecil set a Nov. 12 preliminary hearing for Emily Montague, 55; her ex-husband William Harris, 57; and Michael Bortin, 54.

All were charged in January with killing 42-year-old Myrna Opsahl, a bank customer and mother of four who was depositing church collection money during the April 1975 robbery in suburban Carmichael.

Defense attorneys have asked the court to order a psychiatric exam to determine whether Hearst, kidnapped 30 years ago by the SLA, is able to tell the truth.

Hearst, now Patricia Hearst Shaw, has said she drove a getaway car during the robbery and has named Montague as the shotgun-wielding robber who shot Opsahl.

Sarah Jane Olson, 55, of St. Paul, Minn., pleaded innocent in connection with the robbery earlier this year. A fifth former SLA member accused in the slaying, James Kilgore, has been a fugitive since the 1970s.