Another more devious (and more realistic?) manner of dealing with Carlo would have been for Tom to arrange on his own for Carlo to have an accident-that could not be sourced back to the Family. He never would have talked about it but if it ever came up he would have mentioned something about what a bad husband Carlo was.
If Tom didn't want to go that far he could have arranged for people to keep an eye on Carlo. The Barzini connection would have been discovered earlier.
"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming
Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.
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