What song about a medical student named Maxwell Edison who commits murders with a hammer was first issued a single in Central America?
Oh! Darling:  Although not issued as a single in either the United Kingdom or the United States, a regional subsidiary of Capitol successfully edited it as a single in Central America, having "Maxwell's Silver Hammer" as its B-side. Maxwell's Silver Hammer:  "Maxwell's Silver Hammer" is a rock song with dark, eccentric lyrics about a medical student named Maxwell Edison who commits murders with a hammer, although the lyrics are disguised by the upbeat, catchy, and rather "childlike" sound of the song.
Maxwell's Silver Hammer