A Mississippi man accused of fatally shooting two police officers in Hattiesburg, Mississippi, was reportedly found dead in his jail cell.
The Forrest County Sheriff's Office said that Marvin Banks, 29, was alone in an isolation cell at the time officers found him on the night of Dec. 11, according to NBC News.
CPR was administered before Banks was taken to the hospital, where he was pronounced dead.
Autopsy results revealed that Banks died of severe heart disease, though toxicology results are pending, the Forrest County Coroner said on Dec. 12, according to WDAM.
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Banks was arrested and charged with the deaths of Hattiesburg police officers Benjamin Deen, 34, and Liquori Tate, 25, on May 9. He was charged with two counts of capital murder, one count of grand theft auto, and one count of a felon in possession of a firearm.
The Mississippi Bureau of Investigation will be looking into Banks' death.