Answer:
Mental disease.
Step-by-step explanation:
Psychopathy is a serious personality disorder characterized by a lack of compassion and empathy, a shallow emotional life, egoism and deception. Psychopaths are often liars, then lack a conscience and often lead to crimes, both violent crimes and so-called white-collar crimes. Individuals with such a disorder cannot have a normal relationship with others, as they are cold-blooded and the link between their moral blindness and violence has been shown.