OBITUARY INFORMATION FROM FIND-A-GRAVE WEBSITE:

David Leon Clemens
BIRTH          8 Jun 1936, Perry County, Illinois, USA
DEATH          9 Mar 1974 (aged 37), Hobart, Lake County, Indiana, USA
BURIAL         Evergreen Memorial Park, Hobart, Lake County, Indiana, USA
MEMORIAL ID    158043769

This information was obtained from: https://www.findagrave.com/memorial/158043769/david-leon-clemens. The picture above was obtained from the 1955 HHS Memories yearbook, made available by the Lake County Public Library, at: https://archive.org/details/HOHS1955Images/.