This is what we are seeing in the Renee Good murder and the Trump administration's response.
“The result of a consistent and total substitution of lies for factual truth is not that the lie will now be accepted as truth and truth be defamed as a lie, but that the sense by which we take our bearings in the real world—and the category of truth versus falsehood is among the mental means to this end—is being destroyed.”
Hannah Arendt, The Origins of Totalitarianism