Marc was last seen leaving his home in Des Moines, Iowa, on March 29, 1986. He was on his way to a friend's home, but never arrived. The last time he was seen, Marc was wearing a light blue t-shirt, blue jean shorts, white socks, and gray tennis shoes with velcro fastenings. He has brown hair, blue eyes and a small scar on the top of his head. This is the same area John Gosch dissapeared from in 1982 and Eugene Martin in 1984.