Forensic nursing is a cross between a healthcare profession and a judicial system profession. Forensic nurses perform duties that are much more specialized than nurses typically perform. They have a variety of roles, including evaluating and caring for victims of assault, domestic abuse, child and elder abuse, neglect, and sexual crimes. As they treat the victim, forensic nurses collect and secure evidence. The nurses must ensure they follow the chain of custody so the evidence is documented and remains admissible in court. Forensic nurses may be asked to testify in court about the medical information and the evidence that they have collected. Forensic nursing sub-specialties include death investigations, medical-legal consulting, and forensic psychiatric nursing.