The Marion County Sheriff's Office is searching for a missing man out of Summerfield. Glenn David Sayre, 79, was last seen around 2 p.m. on Monday in the 9500 block of SE 176th Street in Summerfield. He may be driving a 2017 Lincoln MKX with Florida tag 87AANM, and he is wearing a green or yellow tee-shirt, blue jeans, and gray tennis shoes. Sayre stands approximately 6 feet and 1 inch tall and weighs around 190 pounds. He has brown eyes and gray hair.