Heather McCool missing from Mississippi Heather McCool, 30, is missing from Winston County Mississippi. The poster says she was last seen on December 6, 2020, but friends have told her mother she was last seen a few days before Christmas. Jennifer Sullivan, Heather’s mom said said she hasn’t seen or spoken to her daughter since the beginning of December. Sullivan says she very much believes foul play is involved in this situation. Heather has not made any contact with her family. The Sullivan family and the Winston County Sheriff’s office are asking the public for help. The Sullivan family is offering a $10,000 reward for anyone who can lead them to Heather McCool.