15-year-old Monica and her 14-year-old brother, Michael were last seen at Heritage Apartments on Altama Avenue in Brunswick, Georgia on June 21, 1989.
They were helping their stepfather (who was separated from their mother) move into another apartment and their stepfather told the police he dropped them off at the apartment complex, but their mom said she never saw them and they haven't been seen since.
Michael and Monica's stepfather has since moved to Alabama after their disappearances.
At first, Authorities believed that they ran away, but they now suspect foul play. Monica was close to her older sister even though they did not live together.
In 2005, their cases were reclassified as endangered missing. Monica has pierced ears and Michael has a scar on his left knee.