DonGenco is right: that montage was used to show that a war was on, and that many killings occurred after Michael shot Sollozzo and McCluskey. The photo that I think you're referring to--a guy dead and bloody on a tile floor, someone smiling over him--probably depicted a later killing in the war.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.