A 54-year-old Missouri inmate serving a 12-year sentence for drug crimes has died in custody.

According to a news release from the Missouri Department of Corrections, Robert D. Moore died at 11:37am Tuesday at the Crossroads Correctional Center in Cameron.

Mr. Moore was a 54-year-old male serving a 12-year sentence for convictions in Greene County.

He was convicted on charges of possession of a controlled substance, possessing chemicals with intent to produce a controlled substance and producing a controlled substance with a child in the house or within 2000 feet of a school.

Mr. Moore was first received in the Missouri Department of Corrections on July 16, 2009.

The news release says he died of apparent natural causes.