Polygamist sect leader Warren Jeffs' phone privileges have been suspended, as investigators look into whether he preached from prison, authorities said Tuesday.

The Texas Department of Criminal Justice announced last week that it had initiated an investigation into claims that Jeffs used the phone to preach to his congregation on Christmas Day.

Records show that Jeffs made two phone calls on Christmas Day, said Jason Clark, a Criminal Justice Department spokesman, who declined to identify the people who lost their phone privileges with Jeffs.

"It would be a violation of the rules if the person called were to place the call on speaker phone or record the conversation. The Office of Inspector General has asked us to suspend the accounts of certain individuals on his calling list while they continue to investigate," said Clark.

Texas inmates are allowed to call as many as 10 people who have registered with the offender phone system vendor. Calls can be up to 15 minutes in length, and offenders are limited to 240 minutes of phone time per month. All calls are recorded and monitored except those between an inmate and his attorney.

Jeffs remains isolated in protective custody in the state's Powledge Unit prison facility near Palestine, Texas.

"He has no cellmate. No prison job. And the only time he leaves it (his cell) is for a shower and recreation," Clark said.

Jeffs, the leader of the Fundamentalist Church of Jesus Christ of Latter-day Saints, is serving a life-plus-20-year term in Texas for sexual assault. He was convicted in early August of the aggravated sexual assaults of a 12-year-old girl and a 15-year-old girl that Jeffs claimed were his "spiritual wives."

A man accused of killing a 9-year-old Indiana girl with a brick and dismembering her body with a hacksaw is scheduled to appear in court at 9:30 a.m. ET Wednesday for an initial hearing.

Michael Plumadore, 39, faces one count each of murder, abuse of a corpse and moving a body from the scene of crime in the killing of Aliahna Lemmon.

If convicted, Plumadore faces 45 to 65 years on the murder charge alone.

In a probable cause affidavit released last week week, Indiana investigators said Plumadore admitted repeatedly striking the girl in the head with a brick as she stood on the front steps of his mobile home in the early hours of December 22.

Plumador was babysitting Aliahna at the time.

He also told authorities he stored Aliahna's body in garbage bags in a freezer at his home until that night, when he allegedly dismembered it with a hacksaw.

According to the affidavit, Plumadore told investigators he threw parts of the body in a nearby commercial trash bin but kept the head, hands and feet in his freezer.

Authorities have not disclosed a motive for the killing.

Amber Story, the girl's grandmother, had described Plumadore as a neighbor and close family friend.

She said Aliahna and her two sisters were staying with Plumadore for about a week while Aliahna's mother recovered from the flu.

The court hearing wil take place at the Allen County Superior Court.