This research will investigate if treatment will lower aggression levels in individuals with Antisocial Personality Disorder (ASPD) who are non-offenders, first-time offenders, and repeat offenders. 300 participants will be randomly assigned to a control group or the treatment group receiving Cognitive Behavioral Therapy (CBT). The results should indicate that CBT will on average lower aggression in individuals with ASPD and non-offenders. CBT can be utilized to treat people with ASPD to prevent crime and recidivism.