The cause of death of a Grimes County inmate is no longer a mystery.
Sheriff officials say Larry Key Jr., 38, died of natural causes.
An autopsy performed at the Southeast Texas Forensic Center found Key had congestive heart disease, associated with hypertensive heart disease.
Key was found unconscious in his cell in April. He was serving time for two counts of indecency with a child.
On the same day in April, Brazos County inmate Terry Lee Davis was found dead in his cell.
Preliminary autopsy results indicate Davis died from an infection related to a stomach ulcer.
The Somerville man was awaiting trial for aggravated robbery.
Toxicology findings and final autopsy results are pending
Texas Rangers investigated both cases.
That is regular procedure in inmate death cases.