A man views photographs of a bloody murder scene.
In a flashback sequence to the Clutter murders, we see the following:
One of them with a very bloody cut in his throat, and him being shot.
Another being shot with blood splattering on the wall behind him.
We only hear the gunshot that kills someone else.
The immediate aftermath of another person's death (blood is shown on the wall behind her).
Three criminals are executed by hanging (one is shown in full detail, one is briefly heard but never shown, and the last is only implied)