OBITUARY INFORMATION FROM FIND-A-GRAVE WEBSITE:

Walter A Keller
BIRTH        1914
DEATH        1966 (aged 51–52)
BURIAL    Evergreen Memorial Park, Hobart, Lake County, Indiana, USA 
MEMORIAL ID    158376778

This information and pictures below were obtained from: https://www.findagrave.com/memorial/158376778/walter-a-keller.
The picture above was obtained from the 1931 HHS Aurora yearbook (when Walter was a freshman), made available by the Lake County Public Library, at: https://archive.org/details/HOHS1931Images/.