MDOC says the inmate was pronounced dead at the Green County Hospital Monday evening.
Deaths have also been reported in Hancock, Holmes and Webster counties.
Throngs of college students have been gathering on beaches in Baldwin County this week after Florida shut down its restaurants and nightclubs.
During the press conference, it was announced that a student and a nurse both tested positive for the coronavirus.
Representative Gary Chism said the state's Rainy Day Fund sits at $545 million but no one knows if that will be enough.
Meridian Police Lt. Rita Jack says Smith was getting out of truck to go inside the courthouse when the gunfire happened.
The decision comes after the NCAA's COVID-19 advisory panel recommended against playing sporting events open to the general public.
Another Mississippi inmate dies in custody
The body was sent for an autopsy.
Foul play is not suspected in Cox's death. His body is being sent for an autopsy to determine his official cause of death.