Polygamist Warren Jeffs, who is behind bars for child rape, is under investigation for preaching to his cult members on Christmas day from behind prison bars, according to officials.

Jeffs, convicted of sexual assault of two girls, ages 12 and 14, who he claims were his “spiritual brides,” is serving a life sentence in a Texas prison and is now being investigated for possibly preaching to his cult members via telephone, which is a violation of prison rules.

"We have confirmed that Jeffs made two phone calls on Christmas Day to a relative," Texas Department of Criminal Justice spokesman Jason Clark told the LA Times. "At this point, we're investigating whether he may have circumvented policy and may have spoken to his congregation."

Even though he is serving a life sentence for child rape, cult leader Warren Jeffs is still controlling his followers from behind bars.

The leader of the Fundamentalist Church of Jesus Christ of Latter-Day Saints has reportedly directed his cult member to continue following his directives in bizarre ways, ordering cult members that men cannot have sex with their wives, that parents must throw away their children’s toys and that teenage girls are not allowed to have cellphones.

PHOTOS: Warren Jeffs' 50 Brides

He’s written a new book based on “revelations from God” and has sent copies to the members of his breakaway Mormon sect from the Texas prison where he is serving his life sentence.

Fredrick Merril Jessop, a veteran bishop for the Fundamentalist Church of Jesus Christ of Latter Day Saints, was found guilty Monday of illegally marrying his 12-year-old daughter to convicted cult leader Warren Jeffs.

It took the West Texas jury about an hour and 20 minutes Monday to find Jessop, 75, guilty of the third-degree felony, which can be punished with two to 10 years in prison and $10,000 in fines.

"Fredrick Merril Jessop married a freckled, 12-year-old girl to a 50-year-old man," prosecutor Angela Goodwin told jurors in the trial regarding the illegal ceremony, which she said occurred July 27, 2006 at the Yearning For Zion Ranch near Eldorado, Texas.

In August, Jeffs was found guilty on two felony counts of child sexual assault, involving Jessop's 12-year-old daughter and another 15-year-old girl.

One of the wives of polygamist cult leader Warren Jeffs made a dramatic escape from his sect on Monday night with the help of police, RadarOnline.com has learned.

The barefoot woman, who is among an estimated 85 wives married to the convicted sex offender, fled from the Fundamentalist Church of Jesus Christ of Latter-Day Saints in Colorado City, Arizona, and is now getting psychiatric treatment and counseling at a nearby women's shelter.

Sheriff deputies arrived on a "keep the peace" call at about 3 p.m., said Detective Nate Abbott, according to a report in the Salt Lake Tribune.

"She asked for assistance in leaving the community, and a deputy responded and facilitated that request," he explained.

Warren Jeffs, the ailing polygamist cult leader who was convicted of child rape, was moved to a different hospital via helicopter on Tuesday, following his latest fasting stint that landed him in medical care over the weekend.

Jeffs, 50, was taken from a hospital in Tyler, Texas to a prison hospital in Galveston for treatment via helicopter.  He is now awake and responsive according to the Salt Lake Tribune.

Jeffs’ fasting and other health concerns were the reason behind his hospitalization apparently.  “He’s not on a hunger strike,” the prison spokeswoman Michelle Lynons insisted. “He doesn’t appear to be eating enough,” they conceded, but said Jeffs’ hospitalization was “because of the other medical issues, not related to his fast.”

Convicted child rapist Warren Jeffs is in critical condition after being rushed to a Texas hospital after falling ill while fasting in jail, RadarOnline.com can report.

The polygamist cult leader, and former head of the Fundamentalist Church of Jesus Christ of Latter Day Saints, is in prison serving a life sentence after being found guilty of sexually assaulting two young girls, ages 12 and 15, whom he claimed were his “spiritual wives.”

Jeffs is in the East Texas Medical Center in Tyler and the prison spokesman described his condition on Monday.  “Jeffs has not been eating/taking in fluids as he should,” the Salt Lake Tribune reported spokesman Jason Clark said in a statement.  “He indicated he was not on a hunger strike but fasting.  The inmate also has other medical conditions that have risen to the level of needing hospitalization.”

Polygamist cult leader Warren Jeffs is sitting in prison serving his sentence of life plus 20 years for raping two underage girls, ages 12 and 15, who he claimed were his "spiritual wives."

The 55-year-old leader of the Fundamentalist Church of Jesus Christ of Latter Day Saints led his congregation with strictly conservative rules, from their clothing, to no alcohol to almost no exposure to the outside world, so it is shocking to see the photographs of him in modern clothes taken while he was on the run from the law.

PHOTOS: Warren Jeffs On The Run

Warren Jeffs has begun serving his life sentence behind bars, and in these shocking new photos,  the convicted rapist has had his head shaved for his prison stay.

Jeffs, 55, is the polygamist cult leader who was convicted of aggravated sexual assault of a 12-year-old girl and sexual assault of a 15-year-old girl, both of whom he claimed were his “spiritual wives.” The older girl gave birth to his child.

The Texas jury gave the leader of the Fundamentalist Church of Jesus Christ of the Latter Day Saints life plus 20 years sentences after a horrifying trial where multiple witnesses testified about the long term sexual abuse perpetrated by Jeffs.