ST. GEORGE — Building off the criminal conviction of Fundamentalist LDS Church leader Warren Jeffs, authorities in Utah and Arizona are pursuing additional cases against the polygamist sect leader.

"I'm hoping that other people come forward," said Gary Engels, an investigator with the Mohave County (Ariz.) Attorney's Office.

Engels confirmed to the Deseret Morning News he has additional investigations under way into Jeffs, who was convicted in 5th District Court earlier this week of charges of rape as an accomplice, stemming from a marriage he performed between a 14-year-old girl and her 19-year-old cousin.

Washington County prosecutors are now pursuing a rape case against Allen Steed, the groom in that marriage. He was charged Wednesday and is scheduled to be arraigned here on Oct. 4.

However, authorities are keeping tight-lipped about what else they are pursuing Jeffs for.

"To that, I can't speak to. I really don't want to comment on that," Engels said.

Engels said he has no evidence that child-bride marriages are continuing within the FLDS communities of Hildale, Utah, and Colorado City, Ariz.

"I really couldn't tell you if they've stopped or not, but I'm sure they've probably slowed down," he said. "Obviously, someone else is having to perform them now."

Jeffs is facing criminal charges in Mohave County, Ariz., accusing him of sexual conduct with a minor as an accomplice, and incest as an accomplice. Four criminal cases have been filed, but Mohave County prosecutors admit that at least two of them are in jeopardy.

Utah Attorney General Mark Shurtleff has told the Deseret Morning News that his office has been conducting an organized crime probe into Jeffs and the FLDS Church. It stems from the court takeover of the church's financial arm, the United Effort Plan Trust, amid allegations that Jeffs and other FLDS leaders were siphoning money from it.

In 2005, the courts took control of the $100 million trust, which controls homes, businesses and properties in Hildale, Colorado City and the FLDS Church's enclave in Bountiful, British Columbia, in Canada.

Shurtleff and Engels said they would like to see the evidence the FBI seized from a Cadillac Escalade that Jeffs was riding in when he was arrested last year.

On Thursday, a Utah State Courts spokeswoman said that any documents sealed in Jeffs' trial here will remain sealed because of the potential impact they could have on the FLDS leader's cases in Arizona. That could include jailhouse statements that Jeffs has made.

Shurtleff said Jeffs now has an opportunity — to cooperate with law enforcement.

"It'll be interesting to see if he decides now to be more cooperative or forthcoming," Shurtleff said in an interview earlier this week.