Sheriff Steve Rushing said 32-year-old Jimmy Lyons died Saturday. Sheriff Rushings said Lyons was served breakfast at 7:30 that morning and appeared fine . Two hours later, he was found unresponsive in his cell. Lyons was pronounced dead about 10:15 a.m.
Deputy Coroner Robert Tyler says there were no obvious signs of trauma on Lyons' body.
Lyons has been in custody since March 13 charged with the murder of 9-year-old Jamiyah Sims and her father Jeramine Sims Sr. He was also charged with aggravated assault for allegedly shooting two other children and their mother.
Authorities say Lyons was living with the family in Brookhaven where the shooting occurred.