American painter and sculptor, born in St Louis, Missouri, son of a tool designer. At first earned his living by window display in a department store, but also began to paint, self-taught. His early paintings influenced by Pollock, then by Dubuffet and de Kooning; made paintings in 1958-9 of the human figure as prisoner or victim. First one-man exhibition at the Image Gallery, St Louis, 1959. Made assemblages incorporating junk materials in 1960-1, including a Kienholz-type environment 'US Room' 1961. Later in 1961 began an extensive series of works on the theme 'Study/Falling Man', based on the image of man in a technological world, at first paintings of stylised silhouetted figures, then from 1964 mainly sculptures in chrome or nickel-plated bronze, including some with movable parts and with themes such as Wheelman, Carman, Manscape, etc. Since 1972 has made large-scale abstract metal sculptures. Lives in St Louis.