WHO KILLED JAMES EDGAR GOODYEAR?

As reported by https://it.findagrave.com/memorial/182789000/james-edgar-goodyear, Air Force member James Edgar Goodyear was assassinated on September 16, 1971 in Orlando, Florida (sister city with Anaheim, California) , after returning from Vietnam. His Texan wife Judy Buenoano would later be executed years later for the crime, committed through the use of arsenic. Let us now analyze the reason