Not much to add, but there we can observe the DSM (Diagnostic and Statistical Manual ) criteria for a diagnosis of ASPD.
The DSM V lists the following (taken from article) :
A pervasive pattern of disregard for and violation of the rights of others, since age 15 years, as indicated by three (or more) of the following:
Failure to conform to social norms concerning lawful behaviors, such as performing acts that are grounds for arrest.
Deceitfulness, repeated lying, use of aliases, or conning others for pleasure or personal profit.
Impulsivity or failure to plan.
Irritability and aggressiveness, often with physical fights or assaults.
Reckless disregard for the safety of self or others.
Consistent irresponsibility, failure to sustain consistent work behavior, or honor monetary obligations.
Lack of remorse, being indifferent to or rationalizing having hurt, mistreated, or stolen from another person.
The individual is at least age 18 years.
Evidence of conduct disorder typically with onset before age 15 years.
The occurrence of antisocial behavior is not exclusively during schizophrenia or bipolar disorder."
This list can be considered in context from the article:
adding to what ayesha has already explained "antisocial personality disorder" (ASPD) is a mental illness marked by a lack of empathy and consideration for others. Antisocial personality disorder patients exhibit little or no regard for right and wrong. They are antagonistic and frequently act insensitively or unfeelingly. Individuals with this illness are more likely to mislead, act aggressively or violently, and engage in criminal conduct.
Antisocial Personality disorder is a mental disorder in which person doesn't have moral values and they can't differentiate between right and wrong and don't show any regards related to others feeling. It's a spectrum psychopathy and sociopathy are present under this spectrum.