Apparently this John Doe’s remains were found alongside nearby Interstate 65, in the mid 1980’s. His true identity was never discovered, but he is believed to be a victim of the serial killer, known in the media as the Highway Murderer. The emergency personnel, that answered the call to his discovery, raised the money for this headstone and burial. Although this small cemetery, in rural Jasper County, Indiana, near Rennselaer, is closed to new interments, the commissioners donated the plot, and allowed him to be buried here.
The Memorial text reads:-
25 TO 26 YEARS OLD
OF DEATH: MARCH 1982
INTERMENT APR. 22, 1986
I found this web page about Larry Eyler and his crimes, while researching this John Doe grave.
Chicago Tribune article from 2010