LINCOLN, Neb. -- An inmate at the Reception and Treatment Center (RTC) in Lincoln was pronounced dead.

Officials said 75-year-old Larry Loughry died on Saturday. No cause of death has been determined at this time but it was reported that Loughry was being treated for a medical condition prior to his death.

According to court documents, Loughry was serving an 18 to 65 year sentence at RTC that began on March 3, 2006. He was charged for first degree sexual assault and five counts possession of child pornography in Buffalo County.

Authorities said a grand jury will conduct an investigation due to this being a case of an inmate dying while in the custody of the Nebraska Department of Correctional Services (NDCS).