Motivated by the concerns expressed by many academics over difficulties facing the digital forensic field, user-contributory case-based reasoning (UCCBR); a method for auditing digital forensic investigations is presented. This auditing methodology is not designed to replace a digital forensic practitioner but to aid their investigation process, acting as a method for reducing the risks of missed or misinterpreted evidence. The structure and functionality of UCCBR is discussed and its potential for implementation within a digital forensic environment.