Track the changes in narrative.  "If i see a big pile of changes, I can be almost certain that this person is being deceptive without even knowing what I'm really seeing.  So getting good at spotting changes is the first and most important thing.  

Then understanding context and clusters.  Context meaning like, "well, this person is crossing their arms; they must be defensive."  Well, what if it's 50 degrees outside and they're freezing cold?  So context plays an important role for accuracy.  Then there's clusters.  I'm going to look for not just one behavior.  If somebody says, "Oh, they scratched their nose," or "they touched their face, they're lying," or "they looked away for a minute, they're lying."  One behavior never indicates deception by itself.  You should always see a cluster of behaviors.  Sometimes someone is lying and those behaviors aren't there.

And that goes into stakes.  Are you good enough to ask questions that raise the stakes?  So if I give you a picture of a duck right now, and I tell you to convince this person over here that you're looking at a picture of a horse.  You're not going to show a lot of deception indicators.  But if I do the exact same things and say, "If you don't do this, I'm going to put a bullet in your head."  You're doing the exact same lie, the exact same situation, now the stakes are higher, so that your deception indicators are increased.  One of the ways that we might increase stakes is something simple like, "Morgan, I like you as a person, and I don't want you to get tripped up, so I want you to think very carefully before you answer this question.  You understand?"  So now the stakes go up, and I've jumped up your body language with just a little paragraph.  It'll ramp up your brain before the question comes.  And if you're innocent, your brain's not going to get ramped up.  So if a murder took place and you know you're not the killer, you're going to be like, "yeah, okay."  That question won't cause you any stress.  It's like this other question, when you're talking about detecting deception, it's not just about behavior, it's about can you ask good questions?  And one of the best questions in the world is called a "bait question."  Let's say a crime happened let's say some $10,000 West stolen from a grocery store and I've got you in here as a suspect and you did it let's say you did it.  I might say, "Morgan, is there any reason that you can think of that a video would have showed up from a black and white camera, maybe a security camera, that showed that you took the money?" And if you knew there were no video cameras, you'd say, "No," you'd be comfortable, right? So then I'd make it more vague, and I'd say, "Morgan, is there any reason that somebody would have said that they saw your car parked outside that store that evening?"  And you don't know how many people I've talked to, and the only time that you will get nervous is if you were there.  You know that if you're going to commit to lying and I'm about to slam you in the face with evidence, you don't know if I'm about to do that.  That's one of the bait questions that is so important.  It works with kids.  The way to do the bait question is, "Is there any reason . . . might have happened?"  So you never are leading them.  You're not saying, "I have this evidence . . . , is there any reason somebody would have told one of our officers, one of our investigators, that they saw you parked outside of that house, or they saw you at around 9:15 p.m.?"  So the more vague the better it is. 

5:41.  The best one for kids is called the "Punishment Question," and this is "What do you think should happen to the person that did this?"  This has been used in my life when talking to predators, and these are people that prey on children.  And I would say, Well, what do you think should happen to the person that did this?"  And the answer is always something like, "Well, definitely they should apologize to the family.  They did need some kind of counseling."

Something that really lowers the gravity, enormity of the crime.

Yeah, ridiculous.  And they'll say things like, "Obviously, that person is sick and they need help and they need some kind of counseling and therapy."

On my kids I used this. Before when I was in the military, I come home in my uniform one day, like the little camo uniform, walking in and there's a little box of chocolate milk.  It's open.  It's just laying on its side.  All this chocolate milk.  We had a white rug, like an idiot, with kids.  My two kids, Charlotte and William, are in there.  They're probably 5 and 6, somewhere around there.  I was like, "Who brought this milk here in the living room?  You're not supposed to have milk in here, just water."  And they're like, "I don't know."  I looked at my son, "I don't know."  I'm like all right, Charlotte, living room; William, kitchen.