Media outlets reported that Alcorn County Jail employees did CPR on Bridget Marlar after she was found in her cell Aug. 27. She died Sept. 6 at Magnolia Regional Health Center in Corinth.
Sheriff Ben Caldwell told The Associated Press on Wednesday that Marlar had not been convicted. She was jailed about three days before being found unresponsive.
An autopsy shows Marlar died of cardiopulmonary arrest, and Alcorn County Coroner Jay Jones said there was no evidence of foul play. He said results of toxicology tests could take several weeks.
The Mississippi Bureau of Investigation is examining the case, which is standard practice for jail deaths.