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."