He died at age ( 40 or ) 43 of an apparent heart attack .
Thompson 's body was discovered on December 20 , 1954 , in his six - room apartment in Englewood , New Jersey .
Thompson died at age ( 40 or ) 43 of an apparent heart attack .
Thompson 's body was discovered on December 20 , 1954 , in his six - room apartment in Englewood , New Jersey .