Forensic psychology and criminal psychology are closely related. Both subfields support the work of law enforcement and the justice system as a whole. However, there are key differences. Criminal psychology focuses exclusively on criminal law and criminal cases. In contrast, forensic psychology encompasses both criminal and civil cases, as well as academic research and at-risk population counseling. Because forensic psychology is broader in scope, earning a forensic psychology certificate may help you position yourself to pursue a broader range of career opportunities.