Justifications come after a principle is crossed.
Without principles, you don’t need justifications as with no principle, where’s the right/wrong line drawn?
So, somebody has to say “this is a principle”. I don’t have a giant list of principles as I think principles too often cause more harm than good.
But I have a few.
I suppose I look for, “Which is the greater harm?”
In the police case, is it more harm for the police to wait until burial (or track the best friend after leaving? Or more harm to barge into the funeral to arrest?
In the John McCain case, is it more harmful to wait until burial or more harmful to speak at will?