SACRAMENTO, Calif. (AP) — The credibility of newspaper heiress Patricia Hearst will be called into question as four former members of the Symbionese Liberation Army radical group face charges in a deadly 1975 bank robbery, attorneys say.

"Their star witness, their chief witness in this case — that would be Patty Hearst — will be telling untruths," J. Tony Serra, an attorney for murder suspect Michael Bortin, said after a procedural court appearance Monday.

The kidnapped newspaper heiress told the FBI in 1976 that she drove a getaway car during the robbery at the Crocker National Bank in Carmichael. In her 1982 book, "Every Secret Thing," she said SLA members told her one of the accused, Emily Harris, shot a bank customer who was depositing a church collection.

George C. Martinez, Hearst's lawyer, said the defense strategy isn't surprising.

"Her veracity will be judged by the jury at the time of any trial," Martinez said. "What they say or what I say isn't going to make a difference."

The four attorneys say they will also ask the judge to throw out what prosecutors say is new scientific evidence linking shotgun pellets taken from the victim's body 27 years ago with shells recovered at an SLA safe house.

Stuart Hanlon, Harris's attorney, dismissed prosecutors' contentions as "bogus."

"It proves nothing," Hanlon said. "It's not even accepted science."

The lawyers also plan to argue that prosecutors waited too long to bring first-degree murder charges against their clients.

Prosecutors have refused to comment on the case.

Of the ex-SLA members charged, only Sara Jane Olson, 55, has pleaded innocent. Michael Bortin, 53, Emily Harris, 54, and her ex-husband William Harris, 56, have not entered pleas.

A fifth person, James Kilgore, has been a fugitive since the 1970s.

Attorneys for the four say their clients will not cooperate with authorities to draw a lighter sentence.

Olson, formerly known as Kathleen Soliah, was already sentenced to 20 years to life in prison for conspiring to blow up Los Angeles police cars in 1975.