Born in
Los Angeles,
California, Keefer trained as an illustrator at the
Santa Monica School of Art run by
Jefferson Machamer and the
ArtCenter College of Design. He made his debut as a comics artist drawing
Perry Mason for
King Features Syndicate. Other comic strips Keefer has worked in include
Thorne McBride (1960–1963), ''
Rick O'Shay (which he drew between 1978 and 1981) and the comic versions of Dragnet and Gene Autry''. Besides his activity as a cartoonist, Keefer also worked as an illustrator for books, magazines and other publications. In 2007, Keefer was awarded a lifetime
Inkpot Award for his career. Keefer died on February 11, 2022, at the age of 95. ==References==