WHO KILLED SYLVIA JEAN CHANEY AKARD & GARY SAM MCCONNELL?

According to https://it.findagrave.com/memorial/32254582/sylvia-jean-chaney, the couple formed by Sylvia Jean Chaney Akard and Gary Sam Mcconnell (also known as James Gary Mcconnell, son of a freemason, see https:/ /it.findagrave.com/memorial/71461393/sam-a-mcconnell ) was killed on June 26, 1972 with a sum of the digits equal to the Masonic 33 in a thicket near Crook Lake in Paris, Texas.