News outlets report that Regional One Health in Memphis says its investigation into the image shared online led to the man being fired. A picture of the man shows him at a polling place wearing a shirt that has a Confederate flag with a noose in the center and the words "Mississippi Justice."
The hospital's statement didn't identify the man, but he has been identified online as a registered nurse, Clayton John Hickey.
Hickey is a former Memphis police officer who resigned in 2010 when found with a 17-year-old girl and open containers of alcohol in his car. News outlets say attempts to contact him have been unsuccessful.
Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.