I think poor Frankie Five Angels should have got a "pass" as he was DECEIVED into thinking The Corleone Family was behind his being whacked.

Of course, there were no witnesses to collaborate with Frank Pantanglle.

The poor old guy just wanted to live out his life with his apparently nice and caring wife, but fate stepped in and gave Frank a harsh judgement for his past dastardly deeds (for which I'm sure there were many).

we're made to care about Frank, yet the man was a murderer. However, they only killed their own kind, right? So, what? I don't know. I say, "poor Frankie Five Angels." He never did anything to me.