ELDORADO, Texas — Fundamentalist LDS Church leader Warren Jeffs could be served with a grand jury indictment today in his Arizona jail cell, charging him here with sexual assault, a first-degree felony.

A Schleicher County grand jury indicted Jeffs late Tuesday, alongside five other FLDS members. Their indictments remain sealed because they have not been taken into custody.

"I believe they're not in the area," Schleicher County Sheriff David Doran told the Deseret News Tuesday night.

Four of those men were indicted on charges of sexual abuse of a child under the age of 17 and one man received an additional charge of bigamy. Those charges are all first-degree felonies that carry a potential of 99 years in prison or even a life sentence. The last man was indicted on three misdemeanor counts of failing to report child abuse, which could garner six months in jail.

"We are certainly shocked," FLDS member Willie Jessop said Tuesday night. "We'll face those allegations as soon as we know who they're looking for. We think it's ridiculous."

The indictment accuses Jeffs of committing the offense around Jan. 14, 2005, in Schleicher County. Jeffs sexually assaulted a girl under age 17 whom under Texas law he "was prohibited from marrying or purporting to marry" or "living under the appearance of being married," the indictment said.

Around the same time in 2005, Jeffs was reportedly at the YFZ Ranch dedicating the foundation of the group's temple. Jeffs was arrested in August 2006 in a traffic stop outside Las Vegas, then a fugitive on the FBI's Ten Most Wanted list.

The YFZ ranch was raided in April, and hundreds of boxes of evidence were seized as Texas child welfare workers and law enforcement investigated allegations of abuse.

"I just believe the state of Texas is going to continue to move forward on this and continue investigation and identify crimes that have been committed," Doran said.

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Bail for Jeffs was set at $100,000, even though the FLDS leader is already in custody in Kingman, Ariz., where he is facing trial on sexual misconduct charges accusing him of performing underage marriages. Jeffs was convicted in Utah last year of rape as an accomplice, for performing a marriage between a 14-year-old girl and her 19-year-old cousin, and sentenced to a pair of 5-to-life prison terms.

Elissa Wall, who was the star witness in the Utah case, declined to comment on the indictment, her attorney said Tuesday.

"As her lawyer, I'm not surprised," Roger Hoole said. "I am confident that as law enforcement follows the evidence, they will be able to further address the systematic child abuse that occurs in the FLDS community."