I’m a Detective — Do This When You Think Someone Is Lying to You

Including the 3 things most people do that make it worse

Photo by mahdi rezaei on Unsplash

Sixty seconds is about all you’re going to get.

You’re mid-conversation with a partner, colleague, acquaintance, it doesn’t matter. Something they said seems…wrong. Not over-the-top wrong. Just wrong enough that your brain flags it.

Your gut says the person in front of you is lying.

There is a lot of information available on how to spot deception. Much of it is rubbish. The content that isn’t rubbish almost always stops at the same place, the moment you suspect a lie.

What comes next, and how you handle the following sixty seconds, is where most people make their worst decision.

The instinct is to call it out. That instinct is usually wrong.

Your gut is going to tell you to do one of three things. All of them will make it worse.

Call it Out

It feels like the right move, maybe even the one brain yells at you to make. You have the signal, maybe even the evidence, and saying nothing feels like a cop out. So you name it. I don’t believe you. Or some version of it.

Here is what happens next.

The conversation turns hostile, focusing on your accusation. The other person now has a far easier problem to manage — your tone, your evidence, your motives for bringing it up. Experienced interrogators know this.

When you lay your cards on the table, you have surrendered every advantage the other person didn’t even know you had.

There is something else worth understanding. When someone lies to you, it is almost always because they are afraid. Not evil or calculating. Not adversarial. Just afraid.

They have assessed the situation and decided that the truth is riskier than the lie.

Calling it out confirms that. It tells them they were right to be scared. The defenses go up, the story locks in, and the truth becomes less available than it was just sixty seconds ago.

Ask Why

Why did you say that? Why would you tell me that? Why are you lying to me?

“Why” almost always comes across as an accusatory word. The moment you say it, the other person stops recounting events and starts defending their character, and those are very different conversations. One can produce truth while the other rarely does.

I’m begging you: replace "why" with "what."

What happened before that? What did you mean when you said…?

The difference may seem subtle, but it isn’t. It’s the difference between putting someone on trial and asking them to help you understand.

Fill the Silence

This is the mistake decent people make most often and recognize least. They make a statement or ask a question, and the discomfort is immediately apparent. So the silence is filled with a softer restatement, reassurance, or an offer to help the other person explain themselves.

Every one of those moves removes pressure that was doing useful work.

A person managing a lie is generally more taxed than you realize. Keeping a story straight, monitoring your reaction, and suppressing the truth is all exhausting work. Silence does not let them rest.

It forces them to keep running.

Just let the discomfort sit. What follows the silence tends to be more meaningful than anything said to alleviate the pressure. Liars hate silence because what they want most is for you to buy what they’re selling you.

So if you do not call it out, do not ask why, and do not fill the silence — what do you actually do?

You do three things in this order.

Name What You See

Most people never consider this move because it doesn’t feel like one at all. Instead of a question or an accusation, you make an observation.

It seems like something is bothering you. Or — It sounds like there is more to this. That is it.

What you are doing is giving the other person a door. Not a trap, not a test — a door. You state an observation, and now they have a choice. They can walk through it or close it. Either response tells you something useful.

But the ones who have something to hide almost always walk through it, because the alternative (letting your observation sit unanswered) is more uncomfortable than explaining themselves.

This is what skilled interrogators call a label. It is not a question, so it does not trigger the defensive response a question produces. It is not an accusation, so it doesn’t confirm the other person’s fear that honesty is dangerous.

The label works because it gives the other person the illusion of control.

They are not being interrogated. They are being heard. That distinction (as small as it sounds) is the difference between a useful conversation and one that devolves into accusations.

Ask What, Not Why

Once the door is open, it’s always “what” questions that keep it open. What questions are collaborative. They move the conversation forward rather than backward into motive.

What happened after that? What did you mean when you said? What would be most helpful right now?

None of these questions is threatening. Yet all of them require the other person to come up with new information rather than defend old information. And generating new information under stress is where inconsistencies begin to surface.

You do not find them. They appear.

There is a secondary function of “what questions” worth understanding. They transfer the problem. You are no longer the one searching for the truth. You have made the other person responsible for producing it.

Let the Truth Feel Heavy

This is the hardest instruction to follow because it requires you to do less than your brain tells you to do.

Hiding deception is taxing. Keeping a false account straight while monitoring another person’s reactions and suppressing the truth isn’t sustainable. The longer someone carries a lie, the heavier it becomes.

Your job in the final stage of this exchange is to make them carry it.

Do not reassure. Do not summarize what they’ve told you in a way that makes the story feel resolved. Do not move to the next topic.

Stay exactly where you are. Ask one more “what” question if the silence becomes unmanageable.

Then wait again.

What you are waiting for is not a confession. That’s bullshit television drama, and it is largely irrelevant to real life. What you are waiting for is a detail that contradicts an earlier one. Or, a sudden willingness to talk about something they were avoiding ten minutes ago.

That change is the truth becoming more comfortable than the lie.

You did not force it. You just created the conditions for it to come out. There is a meaningful difference between the two, and every skilled interrogator understands it.

None of this is a guarantee.

Some people will not tell you the truth regardless of the conditions you create. Some people aren’t wired that way. Once they lie, they won’t budge from that position.

Knowing what to do in the sixty seconds after your gut fires does not mean the truth will always surface.

The sixty seconds after your gut fires are not the moment most people think they are.

The framework above is not complicated. Name what you see without naming what you think. Ask what, not why. Let carrying the truth become unbearable.

Three moves, applied with patience.

You cannot force the truth out of anyone. Trust me, I’ve tried. But you can make carrying the lie the worst of the two options. And that is enough.

About the Author I spent nearly 13 years as a detective, supervisor, and SWAT-trained fugitive hunter. Today, I combine that field experience with a Master’s in Psychology to better understand human behavior and decision-making under pressure.

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