FAIRVIEW HEIGHTS - Fairview Heights Police are investigating the disappearance of Clark Jefferson, who was last seen leaving his residence in the 800 block of Foxgrove Drive in Fairview Heights during the first week of June 2026, authorities said.The Fairview Heights Police Department said detectives have been searching for Jefferson since a missing person report was filed July 24, 2026.Fairview Heights Police said Jefferson left the residence with a man identified as “Marcus” in a t...