Expert Witness & Digital Forensic Services


Site Contents: © Peter Sommer, 2018   Not to be reproduced without permission

PO Box 6447  London N4 4RX UK




Peter Sommer

Peter Sommer has been providing computer-related expert witness and digital forensic services since 1985, though the practice only began to pick up in 1995.  

His criminal instructions have included not only the obvious “hacking” and “cyber fraud” cases but also terrorism, harassment,  corruption,   child sexual exploitation,  financial services abuses, software and IP piracy and murder.  There have also been instructions before international tribunals and in overseas jurisdictions.   A number of these have made headlines and a few have altered the way in which these crimes were  subsequently investigated and charged.   A number also have been very complex and presented challenges in case management.

Civil instructions have included theft of trade secrets/breach of confidence,  Internet-based defamation,  theft of software code,   IP/copyright breach,   employment disputes, computer contract disputes and insurance claims. Increasingly there have also been disputes about social media and cloud-based activities.   Again, a number of these have set precedents.

As an academic Peter Sommer teaches information system security,  digital investigations and digital forensics,  but his first degree is in law and this enables him to provide uniquely focused services to lawyers and investigators.

This web-site provides a guide to the services available and contains assistance for lawyers and others contemplating an instruction.

Peter Sommer is Professor of Digital Forensics at Birmingham City University, a Visiting Professor at de Montfort University, has developed courses for  the Open University and examined and guest-lectured at many other Universities.    He is a former Visiting Professor at the London School of Economics and Political Science.


In the UK nearly every  business uses computers for their activities, including the use of the Internet;   8o% of British homes have at least one PC, in the average home there are 7 or 8 Internet-enabled devices.  There are over 130 mobile phone contracts per 100 of the population, 85% of users have a smartphone capable of email , web browsing and social media interaction.   Almost anyone who wants a computer can afford one - a home PC costs the equivalent of 1 day’s work at average earnings;  the computers  bought have disk storage of ever larger and cheaper capacities;  a tablet can be bought at less than 1 day’s earnings;  the household with several computers and which have been in use for several years is now not unusual.  At least 70% of the population is active on social media  



Small wonder, then,  that digital footprints of activity are left everywhere we go and that digital evidence is important in an astonishing array of human activities - and that it is used in court and dispute resolution”