Can a liar be caught by the change in his way of speaking?

People lie all the time. People lie to get what they want or they lie because they don’t want to get in trouble. There are a lot of people who are considered habitual liars. These people lie all the time and, sometimes they don’t even realize they’re lying. Detectives and investigators have been trained to catch a liar. They look for body language and facial expressions to determine if someone is lying.

Sometimes, a liar will change the way they speak when they’re lying as opposed to telling the truth. Some people believe that when you lie your voice gets a little bit higher than when you normally speak. Other examples include your voice cracking when you are lying. When someone is lying it may make them uncomfortable so their voice cracks.