Dear reader,

For a study on the process of identifying suspects in the judicial chains, I request your cooperation by guiding this request to the officer in your organization dealing with this. It is not a formal investigation by the ministry but a personal investigation which should contribute in becoming a PhD in the future.

When the police arrests a person suspected of a crime, they must determine the true identity of this person, both in an administrative way as in a biometric way.

1. Is an appropriate procedure or process description available?

  • how is this process organized?
  • what characteristics make up the identity of the suspect?

2. what are the uncertainties when you try to identity the person ?
3. What official would tell me more about this?

  • Is it possible to distinguish between the various forms of law such as criminal law and immigration law.

My intention is to include a number of European countries, (bordering the Netherlands) as well as the United States of America to see if we can learn from each other. Please contact me at the email below. Find me on LinkedIn at

This personal investigation may take a few years to finish and as for now there are only a few general questions. When I have received all the answers, you will be asked for more details by e-mail or phone.

The answers will be made anonymous and your name will not be published.

Thanks for your cooperation,

Clemens Willemsen
Ministry of Security and Justice
Tel: (031) 70-3707153 b.g.g. 4533/6481
E-mail: Room H 18.32
Schedeldoekshaven 100, 2511 EX The Hague, Netherlands
PO Box 20301, 2500 The Hague, Netherlands

Clemens Willemsen works for the Dutch Department of Security and Justice as a strategic manager of information systems in the chain of law enforcement. Sharing information about suspects and convicted criminals helps organisations like police, public prosecutor and correctional facility to establish a total view on the criminal. It is essential to identify the criminal in a correct way with the use of identity documents and biometrics in which areas Clemens is keen to share his knowledge with experts and fieldworkers. Clemens has written a booklet*  titled “biometrics, how it works” and is a guest teacher at the Dutch Police Academy. Currently Clemens is working on his dissertation to identify suspects by the law enforcement agencies in the Netherlands as well as internationally.