Forensic psychologists work closely with both the legal system and law enforcement. Forensic psychologists must have a very clear understanding of the legal system and be able to articulate psychological findings in a way judges, lawyers, and other legal personnel can easily understand and interpret. A primary job for most forensic psychologists is to provide expert witness testimony in criminal cases. They may be asked to comment on the state of mind of the defendant in order to determine his or her guilt or innocence. Individuals in this field may also provide treatment recommendations, assessment of future risks, and criminal profiles. Forensic psychologists should have at least a bachelor's degree in psychology, although a doctorate is common in this field.