Thirteen-year-old Marc told his mother that he planned to walk a friend's house down the street from his family's residence in Des Moines, Iowa on March 29, 1986.
He was last seen leaving his home. He never made it to his neighbor's home and has not been seen again.
Marc has a small scar on the top of his head. He was last seen wearing a light blue t-shirt, blue jean shorts, white socks, and gray tennis shoes with velcro tabs on them.