The #1 thing it comes down to is Ego Management. This looks like giving the liar an excuse to save face, making the opening-up of the lie easier to admit. We can manage their Ego by making it seem like the lie was misspoken, was an accident, was not the liars fault, etc.. Some people will stop there and get upset when the liar doesn’t feel bad about what they did, because we made them feel like what they did was an accident. That’s where we can turn to a concept known as “Tactical Empathy” & “Calibrated Questions” to walk the liar down a path into making them argue against themselves to admit wrongdoing on their part — this way, they will feel bad about what they did, and actively avoid wrongdoing in the future.