The deaths of two inmates at the Moberly Area Correctional Center were caused by overdoses.
Boone County Medical Examiner Carl Stacy says 50 year old Roland Tyler died from a fentanyl overdose, and 33 year old Clayton King died from an overdose of a combination of fentanyl and methamphetamine.
Both men were found unresponsive in their cells on October 4, just hours apart.
Two other inmates died in the same 24 hour period but their deaths were from natural causes.