a person who lies in order to avoid the consequences of confession. He or she is afraid of embarrassment to loved ones and is a serious blow to his or her ego.

a person who has lied for years. This Person is a practical liar and lies when it has a higher payoff than telling truth.

a person who loves to lie and is excited by the challenge of not being detected. He views as another contest and wants to win. He lies because it is the only weapon remaining with which to fight. This person realizes that he or she will probably be convinced but will not give anyone the satisfaction of hearing him or her confess. He wants people to believe that the law is punishing an innocent person.

a person who was trained not to be a squealer. This person loves to be interrogated and has taken a creed either personal or with others, that he or she will never reveal the truth, the creed of underworld gangs.

this type of liar has no conscience. He shows no regret for his dishonest actions and no manifestation of guilt. This is the most difficult type of liar because he is good actor he can fool most investigator.

a person who cannot distinguished what is right from wrong. These are those people who are mentally sick.