Reliability assessment of digital forensic investigations in the Norwegian police

This case study presents a qualitative assessment of the reliability of digital forensic investigation in criminal cases in Norway. A reliability validation methodology based on international digital forensic standards was designed to assess to what extent those standards are implemented and followed by law enforcement in their casework. 124 reports related to the acquisition, examination, and analysis of three types of digital data sources - computers, mobile phones, and storage devices were examined. The reports were extracted from the criminal case management system used by the police and prosecution services. The reports were examined on technology, method, and application level in order to assess the reliability of digital evidence for criminal proceedings.