Cybercrime and cybersecurity are of increasingly high profile not only within law enforcement but among policy makers, legal professionals and the general public. The establishment of the European Cybercrime Centre at Europol and the recent publication of guidelines on the prosecution of social media cases by the Director of Public Prosecutions serve as illustrations of the reach and impact of cybercrime related issues. As more of our day to day lives are conducted via digital mediums, cybercrime has ceased to be a purely specialist area and as technologies rapidly evolve and advance so do the challenges and threats raised, making it more important than ever for practitioners working in this area to stay up to date. Building on the detailed legal analysis in the first edition, this updated text remains the only comprehensive work to cover the complete lifecycle of cybercrimes, from their commission to their investigation and prosecution. With its clear and accesible structure, Computer Crimes and Digital Investigations provides essential guidance on the substantive and procedural aspects of cybercrimes for both experienced practitioners and for those new to the field. Substantial developments have occurred since the publication of the first edition of this work, in terms of the threats faced, the legislation and case law, and the response of law enforcement. The second edition will include new material on topics such as cyberwarfare; orders made against convicted criminals; and issues of surveillance and interception as well as expanded discussions of cyber security policy and laws, intermediary liability, developments in policing activities and prosecution policies, and developments in cross-border search and seizure and mutual legal assistance and extradition. An expanded comparative discussion of law and policy within the EU and under the Budapest Convention, as well as other international organisations such as the United Nations, places cybercrime in its international context.